Form W-9 collects your taxpayer ID so payers can issue accurate 1099s. The 2026 OBBBA raised the reporting threshold from $600 to $2,000, and the IRS released a revised form. This guide explains the line-by-line mechanics, the single-member LLC mistake that triggers backup withholding, and the recordkeeping habits that keep January boring.
How self-employment tax works in 2026 — the 15.3% combined rate, the $184,500 Social Security wage base, the $400 filing threshold, quarterly estimated payment deadlines, the deductions that reduce both income and SE tax, and the income level where an S-corp election starts to pay off (typically $60K–$80K net).
A category-by-category guide to every major small business tax deduction for 2026, including the $2,560,000 Section 179 cap, 60% bonus depreciation, the 68.5-cent mileage rate, the 50% meals rule, and the documentation needed to defend each one on audit.
Personal tax prep fees are no longer federally deductible after the 2026 One Big Beautiful Bill Act, but business owners and self-employed filers can still deduct the business portion on Schedule C, E, F, 1065, 1120-S, or 1120—if they allocate and document it correctly.
A precise 2026 guide to taxable income — which dollars the IRS counts (wages, tips, capital gains, cancelled debt), which are excluded (gifts, inheritances, Roth distributions, muni bond interest), the step-by-step AGI-to-taxable-income calculation, and seven legal strategies to reduce the final number, including new One Big Beautiful Bill Act deductions for tipped, overtime, and senior taxpayers.
A 2026 guide to deducting business travel on Schedule C — covering the IRS tax home rule, the $178 CONUS per diem, 50% meal limits, 75% international business-day threshold, and the documentation habits that survive an audit.
A tax extension buys six months to file, not to pay. This guide explains exactly how to file Form 4868 (individuals) and Form 7004 (businesses), how to estimate a good-faith payment, and the state-level traps that cost filers real money.
A Substitute for Return is a 1040 the IRS files for non-filers using only third-party income data—no deductions, credits, or cost basis. This guide walks through the CP59, CP2566, and 90-day CP3219N sequence and the exact steps to replace an SFR with an accurate original return.
The IRS applies a two-part test to personal appearance expenses: the item must be required by your work and unsuitable for everyday use. Most suits, makeup, haircuts, and gym memberships fail. This guide details what qualifies, with case law including Pevsner v. Commissioner and Hamper v. Commissioner.
Schedule SE calculates the 15.3% self-employment tax (Social Security + Medicare) owed by anyone with $400 or more in net self-employment earnings. This guide walks through the 2026 wage base ($184,500), the 92.35% adjustment, the 50% above-the-line deduction, and the safe-harbor rules that prevent quarterly underpayment penalties.
Take control of your finances with our open-source double-entry accounting system. Start your ledger today.
© 2019 - 2026 Beancount.io
