Disclaimer

Schedule 1-A Tools is an independent website. It is not the IRS, and nothing here is an official ruling about your taxes.

• Not affiliated: this site is not affiliated with, endorsed by, or connected to the Internal Revenue Service, the US Department of the Treasury, or any government agency. IRS forms, fact sheets, and publications referenced here belong to the IRS.
• Estimates only: calculator results are estimates from the figures you enter and the published rules cited on the page. They are not a substitute for completing the actual forms or for professional advice.
• Rules change: the tips, overtime, car-loan, and senior deductions apply to tax years 2025–2028 under current law, and IRS guidance continues to be issued. Each page shows the date its rules were last verified.
• No outcome promised: using these tools does not guarantee any deduction, refund, or audit outcome.

For the official rules, always rely on the IRS sources linked from each page — start with the Accuracy & Sources page.