This IRS form, which is supplemental to the Form 1040 tax return, was introduced for the 2025 tax year to accommodate the new tax deductions available under the “One Big Beautiful Bill” Act. Depending on your modified adjusted gross income (MAGI), Schedule 1-A is where you determine your eligible deductions and their amounts for tips, overtime pay, and car-loan interest, plus the enhanced deduction for seniors.

See an article in the Journal of Accountancy about Schedule 1-A: New Schedule 1-A For Tips, OT, Car Loans, And Senior Deductions Published (March 2026).

The final version of Schedule 1-A does not differ from its draft version. Other resources on Schedule 1-A include the following articles published while it was still in draft form:

• Understanding The Draft Schedule 1-A (Form 1040) For 2025: A Technical Review Of New Additional Deductions For Tax Professionals, from Thomas Zollars & Lynch
• Highlights Of New Draft Schedule 1-A, Additional Deductions, from the AICPA