Educational Tax Guides · Updated April 2026
Free Tax Guides for 2026
IRS-verified explanations of refund timing, deductions, OBBBA tax changes, filing requirements, self-employment tax, EITC, Child Tax Credit, and state refund processing — written for real people, not tax professionals.
What You'll Find Here
National Tax Tools guides cover the most important tax topics for freelancers, independent contractors, and small business owners. Every guide is based on current IRS publications, reviewed by Nausheen Shahid, and updated for Tax Year 2026. Content is structured, accurate, and written to help you understand your actual tax obligations. For full team credentials, see our About page.
Key Takeaways
- Self-employed workers owe 15.3% self-employment tax on net earnings in addition to regular income tax.
- Quarterly estimated tax payments are due April 15, June 15, September 15, and January 15.
- You can deduct 50% of self-employment tax from your adjusted gross income.
- The IRS safe harbor rule lets you avoid underpayment penalties by paying 100% of last year's tax liability (110% if AGI exceeded $150,000).
- S-Corp election can significantly reduce SE tax once net profit exceeds roughly $40,000–$50,000 annually.
All Guides & Tools
Core Guide · Self-Employment
Self-Employment Tax: The Complete Guide
Everything you need to know about the 15.3% self-employment tax — how it's calculated, the 92.35% rule, the SE deduction, quarterly payments, and strategies to reduce your bill.
Read guide →Core Guide · Entity Planning
LLC vs S-Corp: When the Election Makes Sense
How S-Corp election reduces SE tax by limiting FICA to your reasonable salary, what compliance costs are involved, and the financial breakeven calculation for 2026.
Read guide →Core Guide · S-Corp · Audit Defense
Reasonable Salary for S-Corp Owners: The IRS Nine-Factor Test
How the IRS determines whether an S-Corp owner's salary is reasonable, why the 60/40 rule is a myth, what Watson v. Commissioner means for your audit risk, and the four-step documentation framework that protects you.
Read guide →Core Guide · Payroll · Supplemental Wages · 2026
Bonus Tax Withholding Guide 2026: Flat Rate vs Aggregate Method
Why your bonus feels like it lost 40 percent. How the 22 percent flat rate, the aggregate method, FICA caps, Additional Medicare, and state supplemental rates interact. Includes year-end planning moves (401(k) bonus deferral, Q4 estimated payment) that actually reduce what you pay.
Read guide →Core Guide · Family · CDCTC vs DCFSA · 2026
Dependent Care FSA vs Child Care Tax Credit 2026: Which Saves More?
Full decision framework for the Dependent Care FSA ($7,500 new OBBBA limit) versus the Child and Dependent Care Credit (50/35/20 percent tiers). Side-by-side savings by income band, the IRC §21(c) no-double-dip rule, and the employer plan-amendment checklist.
Read guide →Core Guide · IRS Resolution · CP/LTR Decoder · Free Help
IRS Sent You a Letter? Here Is What It Means and How to Respond
Plain-language guide to the most common IRS notices: CP2000, CP14, CP501-504, LT11, CP05, CP12, CP49, CP75, CP3219A, identity verification letters. Response deadlines, what to do if you agree or disagree, the IRS collection sequence, and where to get FREE legal help (Taxpayer Advocate Service, Low Income Taxpayer Clinics, VITA).
Read guide →Core Guide · Equity Compensation · IRC §83(a) · 2026
RSU Tax Guide 2026: Vesting, Sell-to-Cover, and the Withholding Shortfall
Why vest is the taxable event under IRC §83(a), why an 83(b) election does not apply to RSUs, sell-to-cover mechanics, the 22 percent supplemental withholding gap that surprises senior tech and finance employees, double-trigger RSUs at private companies, and post-vest capital gains. Includes the practitioner playbook for covering the marginal-rate shortfall.
Read guide →Core Guide · Side Hustle · IRC §183 · Schedule C · 2026
Hobby or Business? IRS Rules for Side Hustles and Gig Work
Treasury Regulation §1.183-2(b) nine-factor profit motive test, the IRC §183(d) 3-of-5-year safe harbor (2 of 7 for horses), the $400 self-employment tax trigger, Schedule C requirements line-by-line, the TCJA hobby expense suspension, and the practitioner framework for converting a hobby into a Schedule C business.
Read guide →Core Guide · Schedule E · IRC §469 · §280A · 2026
Rental Income Tax Guide: Schedule E, Depreciation, and Passive Loss Rules
Schedule E vs Schedule C, MACRS 27.5-year straight-line depreciation, the IRC §280A 14-day Augusta Rule, the $25,000 passive loss allowance under §469(i), real estate professional status under §469(c)(7), the short-term rental loophole, NIIT exposure, and the §1250 depreciation recapture trap at sale.
Read guide →Core Guide · Retirement · IRS Notice 2025-67 · SECURE 2.0 · 2026
401(k) Contribution Limits 2026 Guide: $24,500 Deferral, Catch-Up, Match
2026 employee elective deferral $24,500, age-50 catch-up $8,000, SECURE 2.0 super catch-up $11,250 for ages 60 to 63, $72,000 annual additions cap, $360,000 compensation cap, $160,000 HCE threshold, the SECURE 2.0 Roth catch-up requirement above $150,000 wages, employer match formulas, and the Mega Backdoor Roth strategy.
Read guide →Core Guide · Retirement · IRS Notice 2025-67 · IRC §408A · 2026
Roth IRA Contribution Limits 2026 Guide: $7,500 Limit, MAGI Phase-Out, Backdoor Roth
2026 Roth IRA contribution limit $7,500, age-50 catch-up $1,100 (newly COLA-adjusted under SECURE 2.0 §108), MAGI phase-outs by filing status ($153K to $168K Single, $242K to $252K MFJ, $0 to $10K MFS-Together), the spousal IRA rule, the backdoor Roth IRA strategy with the pro-rata aggregation trap, the 5-year rule, the lifetime RMD exemption, and year-end planning moves.
Read guide →Core Guide · Independent Contracting
What to Charge as a 1099 Contractor
How to calculate your break-even hourly rate using the four-cost formula: employer FICA premium, health insurance, non-billable days, and overhead. Includes the break-even formula, contract-vs-salary comparison, and quarterly tax planning. Uses 2025 IRS rates.
Read guide →Core Guide · Estimated Taxes
How to Pay Quarterly Taxes
Who must pay, all four 2026 due dates (Q1–Q4), how to calculate your quarterly payment, safe harbor rules (90% / 100% / 110%), and how to avoid the IRS underpayment penalty. Covers Form 1040-ES and payment methods.
Read guide →Core Guide · Tax Debt · Installment Agreement
IRS Payment Plan Options: How to Pay Taxes You Owe
Short-term plans (180 days, no fee) vs long-term installment agreements (72 months, $22–$178 fee). Covers interest costs, setup fees by application method, Currently Not Collectible status, Offer in Compromise, and first-time penalty abatement for 2025–2026.
Read guide →Core Guide · Income Tax · IRC §85
Is Unemployment Taxable? Federal & State Tax Rules (2025)
Yes. Unemployment compensation is fully taxable federal income under IRC §85. Covers Form 1099-G reporting, Form W-4V 10% withholding, state exemptions (CA, NJ, PA), EITC earned income rules, FUTA, and the expired $10,200 exclusion for TY 2025.
Read guide →Core Guide · Income Tax · IRC §117
Scholarship and Fellowship Tax Guide: What Is Taxable and What Is Not
A complete guide to the IRC §117 exclusion for scholarships and fellowships. Covers qualified expenses, the degree candidate rule, TA and RA stipend taxation, quarterly estimated payment requirements, and the AOTC coordination trap. Includes 2025 calculation examples.
Read guide →Core Guide · Education Credits · IRC §25A · Form 8863
Education Tax Credits 2025: American Opportunity vs Lifetime Learning Credit
Complete comparison of the AOTC and Lifetime Learning Credit for 2025. Covers credit amounts, eligibility rules, qualified expenses, income phase-out, scholarship coordination, and the right credit for undergraduates, graduate students, and part-time learners.
Read guide →Core Guide · Filing Requirement · IRS Pub 501
Do I Need to File Taxes? 2025 Filing Thresholds Explained
A plain-language guide to the 2025 federal filing thresholds for every filing status and age combination. Covers the dependent filing rules, blind add-ons, special triggers (SE income, HSA, marketplace coverage), and six reasons to file even when not required. Based on IRS Publication 501.
Read guide →Interactive · 1099 Tax
1099 Tax Calculator
Instantly estimate your full federal tax liability on 1099 income — including self-employment tax, income tax by bracket, effective rate, and your quarterly estimated payment. No signup required.
Open calculator →Reference · Deadlines
2026 Tax Deadlines & Countdown Timers
Live countdown timers for every major 2026 federal tax deadline: Form 1040 (April 15), quarterly estimated taxes (Q1–Q4), S-Corp and Partnership returns (March 16), 1099 e-file (March 31), and more.
View deadlines →Tool · Refund Tracking
Federal & State Tax Refund Tracker
Direct links to the IRS Where's My Refund tool and all 50 state refund status portals. Includes typical wait times, what information you need, and what to do if your refund is delayed.
Track refund →Refund Guide · IRS Status
IRS "Still Being Processed": What It Means
Your IRS tracker shows "Still Being Processed" — here's what it means, how long it takes, the most common causes, and exactly when to contact the IRS or Taxpayer Advocate Service.
Read guide →Refund Guide · State Refunds
State Tax Refund Processing Times (2026)
E-filed and paper return processing windows by state — California, New York, Virginia, Pennsylvania, New Jersey, Illinois, Georgia, Michigan, and more. Includes why times vary and what to do if your refund is delayed.
Read guide →Refund Guide · WMR Tax Codes
IRS Tax Topics Explained: What 152, 151, 203 Mean (2026)
Tax Topic 152 means normal processing. Topic 151 means the IRS has proposed an adjustment to your return and you have appeal rights. Topic 203 means your refund was reduced by a government debt offset. Includes what to do when the topic disappears from WMR.
Read guide →Refund Guide · IRS Contact
When to Call the IRS About Your Refund
The IRS recommends waiting 21 days after e-filing or 6 weeks after mailing before calling 800-829-1040. Learn what to have ready, when calling helps, and when to contact the Taxpayer Advocate Service instead.
Read guide →Refund Guide · Delay Reasons
Why Is My Tax Refund Delayed? (2026)
The most common causes of a delayed federal refund: PATH Act holds on EITC and ACTC returns, identity verification letters, math errors, refund offsets, and manual review. Includes IRS status message explanations and a step-by-step action guide.
Read guide →Refund Guide · Processing Timelines
IRS Refund Timeline: How Long Does a Tax Refund Take? (2026)
Standard IRS processing windows for e-filed and paper returns, PATH Act holds on EITC and ACTC claims, direct deposit vs. paper check delivery times, and amended return timelines. Includes Where's My Refund guidance.
Read guide →Refund Guide · Amended Return Status
Where's My Amended Return? IRS 1040-X Status Guide (2026)
How to check your amended return status using the IRS Where's My Amended Return tool. Covers the three status stages, processing times up to 20 weeks, e-file vs. paper timelines, and when to call the IRS about Form 1040-X.
Read guide →Refund Guide · Approved Status
IRS Refund Approved But Not Sent (2026)
What the IRS "Refund Approved" status means, how long direct deposit and paper check delivery take after approval, why the deposit date may pass without funds arriving, and when to contact the IRS or your bank.
Read guide →Refund Guide · Processing Stages
IRS Refund Processing Stages Explained (2026)
A complete breakdown of the three stages in Where's My Refund: Return Received, Refund Approved, and Refund Sent. Covers what each status means, how long each stage lasts, PATH Act impact, and what to do when a stage stalls.
Read guide →Refund Guide · Missing Refund
IRS Refund Sent But Not Received (2026)
What to do when Where's My Refund shows "Refund Sent" but no direct deposit has arrived or no paper check has appeared in the mail. Covers IRS refund trace procedures, Form 3911, replacement check timelines, and stolen check recovery.
Read guide →Refund Guide · Offset · Treasury TOP
Tax Refund Offset: Why Your Refund Was Reduced (2025)
Which debts can reduce your federal tax refund through the Treasury Offset Program, in what order offsets are applied, how to check if your refund will be offset, and how injured spouse relief (Form 8379) works.
Read guide →Refund Guide · Identity Verification
IRS Letter 5071C: Identity Verification Guide (2026)
What IRS Letter 5071C means, how to verify your identity online at idverify.irs.gov or by phone, what documents to prepare, and what to expect after verification. Includes steps if you did not file the return and how 5071C differs from other identity letters.
Read guide →Hub · Payroll Tools
Payroll Calculators and Payroll Tax Tools
Entry point for the payroll vertical. Covers payroll calculators, state payroll tax hubs, and payroll guides for employees and employers. Includes FICA withholding, Form W-4, and payroll tax deadlines.
View payroll tools →Guide · OBBBA · Tip Deduction
No Tax on Tips: OBBBA Deduction Explained
Complete guide to the qualified tip income deduction under IRC § 224. Covers which occupations qualify, how the phase-out works, FICA/SECA impact, how to claim on Schedule 1-A, and when the deduction does not apply.
Read guide →Guide · OBBBA · Overtime Deduction
No Tax on Overtime: OBBBA Deduction Explained
Complete guide to the qualified overtime compensation deduction under IRC § 225. Covers the premium-only rule, FLSA overtime definition, phase-out mechanics, FICA treatment, and how to claim on Schedule 1-A for TY 2025.
Read guide →Guide · OBBBA · Auto Loan Deduction
Auto Loan Interest Deduction: OBBBA § 227 Explained
Complete guide to the qualified motor vehicle loan interest deduction under IRC § 227. Covers qualifying vehicle rules, the U.S.-assembly requirement, phase-out mechanics, refinancing restrictions, and how to claim on Schedule 1-A for TY 2025.
Read guide →Guide · OBBBA · SALT Cap Increase
SALT Deduction Cap Increase 2025–2029: $40,000 Limit Explained
How the OBBBA raised the SALT deduction cap from $10,000 to $40,000 for TY 2025–2029. Covers who benefits, the itemizing requirement, phase-out above $500,000 MAGI, AMT interaction, and how to claim on Schedule A.
Read guide →Guide · OBBBA · Children's Savings
Trump Account (MAGA Account) 2025: Rules, Limits, and How It Works
How Trump Accounts work under the OBBBA. The $1,000 federal seed for newborns, the $5,000 annual contribution limit, U.S. index fund restrictions, distribution rules at age 18, and how it compares to 529 plans and Coverdell ESAs.
Read guide →Guide · OBBBA · CTC · Refundable Credit
Child Tax Credit Under the OBBBA (2025): $2,500 Per Child, Eligibility, and Refundability
How the OBBBA changed the Child Tax Credit. $2,500 per qualifying child for TY 2025–2028. Covers phase-out thresholds, the ACTC refundable formula, qualifying child rules, PATH Act hold, and comparison to prior TCJA law.
Read guide →Guide · OBBBA · Senior Deduction · Age 65+
New $6,000 Senior Tax Deduction Explained (OBBBA 2025–2028)
How the OBBBA added a $6,000 enhanced standard deduction for taxpayers age 65 or older. Covers the three-layer deduction system, phase-out rules ($75K single / $150K MFJ), MFS ineligibility, how to claim on Schedule 1-A, and the 2028 sunset.
Read guide →Hub Guide · OBBBA · All Six Provisions
OBBBA Tax Changes 2025: All Six Provisions Explained
Complete reference for the One Big Beautiful Bill Act (Pub. L. 119-21). All six TY 2025–2028 tax provisions in one place: no tax on tips, no tax on overtime, auto loan interest deduction, SALT cap increase, Trump Account, and Child Tax Credit. Includes who is affected, how to stack benefits, and links to every calculator and guide.
Read hub guide →Guide · MFJ vs MFS · Head of Household · IRC §§ 1, 2
Tax Filing Status Guide 2025: How to Choose the Right One
All five 2025 filing statuses explained with standard deductions and bracket thresholds. Covers the head of household requirements most filers get wrong, the "considered unmarried" rule for married filers, credits lost by filing separately, and the MFJ vs MFS income tax comparison. Includes the student loan repayment tradeoff analysis.
Read guide →Guide · IRC §86 · Provisional Income · OBBBA §70103
Is Social Security Taxable? How to Calculate Your Taxable Benefits
Complete guide to Social Security benefit taxation under IRC Section 86. Covers the three-step provisional income formula, the 0%/50%/85% taxability tiers, the tax torpedo effect, the OBBBA $6,000 senior deduction impact, states that tax Social Security, and strategies including Roth conversions and Qualified Charitable Distributions.
Read guide →Guide · Form W-4 · IRC §3402 · TY 2026
How to Fill Out the W-4 Form in 2026 (Step-by-Step)
Complete walkthrough of all five W-4 steps: personal information and filing status, the multiple-jobs adjustment (the most commonly skipped step), dependent credits, other income and deductions, and signature. Covers OBBBA deductions for tips, overtime premium, and seniors, and explains when to submit a new W-4.
Read guide →Guide · Refundable Credit · IRC § 32
Earned Income Tax Credit 2025: Income Limits, Eligibility, and Amounts
Complete reference for the 2025 EITC. Covers income limits for 0 to 3+ children, the phase-in and phase-out mechanics, qualifying child rules, the special rules for workers without children, and the PATH Act refund hold. Includes three worked scenarios and practitioner notes on the investment income trap.
Read guide →Guide · Schedule A · OBBBA SALT
Itemized Deductions List 2025: What Can You Deduct on Schedule A?
Full breakdown of every Schedule A deduction category for 2025: SALT ($40,000 OBBBA cap with phase-out), mortgage interest ($750K debt limit), charitable contributions, medical expenses (7.5% AGI floor), and casualty losses. Covers who benefits most from itemizing and the MFS coordination rule.
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Frequently Asked Questions
Questions About Your Tax Situation?
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