How to Claim the New Deductions: A Schedule 1-A Walkthrough

Knowing you qualify for the new deductions is half the job; the other half is getting them onto your return correctly. The IRS built a single new form for all four: Schedule 1-A (Form 1040), "Additional Deductions," first published for the 2025 tax season and described on IRS.gov. The overtime, tips, car loan interest, and senior deductions are each computed in their own part of that schedule, added together, and carried to one line of Form 1040. This walkthrough takes the process in order, from paperwork to the finished line. For what each deduction actually covers, start with the pillar guide.

Step 1: Confirm the gate requirements

Before touching the form, check the conditions that apply regardless of dollar amounts. You need a valid Social Security number for the overtime, tips, and senior deductions, and if you are married you must file jointly to claim them; the reasons and edge cases are covered in filing jointly vs separately. For the car loan deduction, the vehicle must be new, for personal use, assembled in the United States, and you will need its vehicle identification number for the return. For the senior deduction, each person claiming it must be 65 or older by the end of the tax year.

Step 2: Gather the numbers from your information forms

For tax year 2026, the redesigned Form W-2 does most of the work. Qualified overtime compensation appears in box 12 under new code TT, and cash tips reported to your employer appear in box 12 under new code TP, with your Treasury tipped-occupation code shown in the new box 14b. Car loan interest arrives on Form 1098-VLI from your lender when the year's interest is $600 or more. For tax year 2025, the transition year, the IRS did not require employers to report the new amounts separately, so your 2025 W-2 may not show them; Notice 2025-69 on IRS.gov allows individuals to use a reasonable method, such as year-end pay stubs showing overtime hours and rates, to reconstruct the qualified figure. If you are self-employed with qualified tips, your own records and tip logs are the source.

Step 3: Work through Schedule 1-A part by part

Each deduction has its own section of the schedule, and each section applies its own cap and its own phaseout using your modified adjusted gross income: up to $12,500 (single) or $25,000 (joint) for overtime, up to $25,000 for tips, up to $10,000 for car loan interest, and $6,000 per qualifying senior. The schedule walks you through the arithmetic, but if your income sits near a threshold it pays to understand what is happening; the mechanics are explained in income phaseouts and MAGI. Remember the amounts you start from are the qualified figures, which is the overtime premium only, not the whole overtime paycheck, and voluntary tips only, not service charges.

Step 4: Carry the total to Form 1040

The parts are then totaled, and per the IRS the combined amount goes on line 13b of Form 1040 or Form 1040-SR, or line 13c of Form 1040-NR. Two properties of that placement matter. First, it sits alongside the standard deduction rather than inside itemized deductions, which is why you can claim these deductions whether or not you itemize. Second, the total reduces your taxable income but not your adjusted gross income, so anything in your tax life keyed to AGI or MAGI, including the phaseouts of these very deductions, is unaffected by claiming them.

Step 5: File and keep the proof

Nothing extra needs to be mailed in, but the substantiation should stay in your files: the W-2 with its codes, pay stubs used for a 2025 reasonable-method calculation, tip records, Form 1098-VLI, and the vehicle purchase paperwork showing the VIN. The companion article on recordkeeping for the 2026 deductions lists the document set for each deduction and how long to keep it.

Mistakes to avoid on the schedule

A few errors are predictable enough to flag in advance. Deducting the whole overtime wage instead of only the premium half overstates the overtime deduction roughly threefold. Counting mandatory service charges as tips claims income that never qualified; the dividing line is drawn in the occupation list and voluntary-tip test. Claiming used-vehicle or lease interest under the car loan deduction fails the "new vehicle" and loan-type requirements. Filing separately while married forfeits deductions the household believed it had. And expecting a payroll-tax refund misunderstands the design: these deductions reduce income tax only, while Social Security and Medicare taxes on wages and tips are unchanged.

What if you already filed without claiming a deduction?

Because 2025 was the first year and many W-2 forms did not show the new amounts, some eligible filers will only discover a deduction after filing. The ordinary remedy applies: an amended return on Form 1040-X, with the reconstructed qualified amounts and records to support them. That is a normal, allowed correction, but it is slower than claiming correctly the first time, which is a good argument for checking all four deductions before you file rather than after.

General information, not tax advice

This article is general information about the filing mechanics of the 2025 through 2028 deductions and is not tax advice. Form line numbers, schedules, and reporting codes are set by the IRS and can change from year to year, so always follow the instructions for the tax year you are filing, available at IRS.gov, and consult a qualified tax professional about your own return.