Guides

Tax guides

Clear, sourced explanations of the US tax rules that matter most in 2026, with links to official IRS pages and our free calculators.

Filing

How to file Form 1040 yourself for free (2026 guide)

Step-by-step guide to filing your federal Form 1040 at no cost: IRS Free File ($89,000 AGI limit), Free File Fillable Forms, VITA and paper filing with TaxPilot.

Read guide →
Business

LLC vs S-Corp vs C-Corp: how each is taxed in 2026

Compare LLC, S corporation and C corporation taxes: pass-through vs 21% corporate tax, self-employment tax, reasonable salary, double taxation and the 20% QBI deduction.

Read guide →
Self-employed

Self-employment tax explained: rates, wage base and how to calculate it

Self-employment tax is 15.3% on 92.35% of net earnings: 12.4% Social Security up to $184,500 in 2026 plus 2.9% Medicare. Learn how to calculate it and the deduction for half.

Read guide →
Planning

Quarterly estimated taxes: 2026 due dates, safe harbor and how to pay

Who must pay 1040-ES quarterly estimated taxes, the 2026 due dates (April 15, June 15, September 15, January 15, 2027), the 90%/100%/110% safe harbor rules and how to pay online.

Read guide →
States

State income tax by state: 2026 overview of rates and no-tax states

2026 state income tax overview for all 50 states and DC: nine states with no wage tax, flat-tax states, top marginal rates and what TaxPilot models.

Read guide →
New law

New deductions for 2025-2028: no tax on tips, overtime, seniors and car loan interest

How the new Schedule 1-A deductions work: up to $25,000 of tips, $12,500 of overtime premium ($25,000 joint), $6,000 for seniors 65+ and $10,000 of new car loan interest, with income phase-outs.

Read guide →