Guides
R&D Credit and Mileage: Federal Rules for Boston and Chicago Firms
Business tax deductions and mileage beside the R&D credit: the federal Section 41 claim on Form 6765, the payroll election, state rates, and the records.
Archive
October 2026
Costs
Are Sales Tax Registration and Filing Fees Deductible on Schedule C?
Sales tax registration and filing fees are deductible business expenses. Here is what Texas and Illinois sellers can write off, and how mileage fits.
Guides
Self-Employed Deduction Order: Mileage, SEP-IRA and Quarterly Tax
Self-employed deduction order: standard mileage, SEP-IRA contributions and quarterly tax decide how a lean year and a strong year are funded.
Rules
How Marriage Changes Your IRS Filing Status as a Sole Proprietor
Your IRS filing status after marriage turns on December 31 and changes your standard deduction, Section 179 limit, payroll and estimates.