What to know about Schedule 1-A 

The One Big Beautiful Bill Act (OBBBA) didn’t just tweak a few numbers for 2025 — it reshaped the 2026 tax season for many people. To help individuals claim the Act’s new deductions, the IRS rolled out a brand-new attachment: Schedule 1‑A. Instead of squeezing new, highly specific write-offs into the margins of Form 1040, the IRS put them on a dedicated schedule — so taxpayers claiming the new deductions have a single, standardized place to calculate them and then carry one total back to Form 1040.

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What is Schedule 1-A?

Who should file the Schedule 1-A form?

Should Schedule 1-A be completed if claiming the standard deduction?

How is MAGI different for Schedule 1-A?

What are the most common mistakes taxpayers might make on Schedule 1-A?

How to file Schedule 1-A with Form 1040

What is Schedule 1-A?

Schedule 1-A (Additional Deductions) is a new “add-on” schedule for additional deductions that don’t get entered directly on Form 1040/1040-SR/1040-NR. It is used to report specific deductions that are taken in addition to the standard deduction or itemized deductions. It currently covers four buckets:

No Tax on Tips: A deduction for qualified tips
No Tax on Overtime: A deduction for qualified overtime compensation
No Tax on Car Loan Interest: Qualified passenger vehicle loan interest, with VIN reporting
Enhanced Deduction for Seniors: Extra deduction for eligible seniors

The total from Schedule 1-A flows to Form 1040, line 13b.

Who should file the Schedule 1-A form?

Taxpayers should file Schedule 1-A if they qualify for at least one of the four additional deductions created by the OBBBA. In practical terms, Schedule 1-A should be filed for 2025 if:

The taxpayer received qualified tips and meets the requirements (including valid SSN rules and, if married, filing jointly).
The taxpayer received qualified overtime compensation (generally the FLSA overtime premium portion) and meets the requirements (including valid SSN rules and, if married, filing jointly).
The taxpayer paid/accrued qualified passenger vehicle loan interest and can provide required details, including VIN.
The taxpayer qualifies for the enhanced deduction for seniors, based on birthdate/age rules, valid SSN rules, and joint filing requirement if married.

Note that these deductions are potentially limited based on the taxpayer’s modified adjusted gross income (MAGI), which is computed in Part I of Schedule 1-A.

Should Schedule 1-A be completed if claiming the standard deduction?

Schedule 1-A deductions are available whether the taxpayer takes the standard deduction or itemizes. In other words, taking the standard deduction does not disqualify someone from Schedule 1-A deductions.

How is MAGI different for Schedule 1-A?

Schedule 1-A uses its own MAGI calculation to determine whether each deduction is reduced (phased out).

In general, the Schedule 1-A MAGI starts with:

AGI from Form 1040/1040-SR/1040-NR, line 11b, and then
You may need to add back certain items such as excluded Puerto Rico income and amounts tied to Form 2555 (foreign earned income) or Form 4563 (exclusion of income from American Samoa sources), if applicable.

If you don’t have excluded Puerto Rico income and you aren’t filing Forms 2555 or 4563, your MAGI is typically just your AGI (line 11b) for this schedule.

What are the most common mistakes taxpayers might make on Schedule 1-A?

Thinking “no tax on tips” means “don’t report tips.” You still generally report tips as income; Schedule 1-A is where you may claim a deduction if they’re qualified.
Including non-qualified “tips,” like mandatory service charges or automatic gratuities. If the customer can’t freely change/decline it, it may be a service charge — not a qualified tip.
Using total overtime pay instead of the FLSA overtime premium portion. Schedule 1-A overtime is aimed at the premium (the “half” portion of time-and-a-half), not all overtime wages.
Missing key eligibility rules. Several of these deductions require a valid SSN, and married taxpayers often must file jointly to claim them.
Car loan interest issues: forgetting VINs, including a lease, or double-deducting interest. The car loan interest deduction has strict requirements (including VIN reporting), and you can’t deduct the same interest twice (for example, both on Schedule C and again on Schedule 1-A).

To read through example scenarios,  read pages 101-110 of the 2025 1040 (and 1040-SR) Instructions. 

How to file Schedule 1-A with Form 1040

To file Schedule 1-A with Form 1040, start by calculating the AGI just like any other return. Schedule 1-A’s first job is to confirm your MAGI, which should be easy for most taxpayers. If there’s no excluded Puerto Rico income and there’s no Form 2555 or Form 4563, then Schedule 1‑A’s MAGI is essentially just Form 1040 line 11b entered on Schedule 1‑A, line 3. If those items do apply, Schedule 1‑A walks through the add‑backs on lines 2a–2e so the phaseouts for these new deductions are calculated consistently.

Complete Form 1040 through AGI
Fill out Schedule 1-A Part I (MAGI) and then complete only the parts the taxpayer qualifies for: Part II (Tips), Part III (Overtime), Part IV (Car loan interest + VIN), Part V (Enhanced senior deduction)
Carry the total additional deductions to Form 1040

The main “workflow” win for tax preparers? Schedule 1-A consolidates these new deductions into one place and then feeds a single total to the 1040. For firms using Thomson Reuters UltraTax CS, you can handle Schedule 1-A as part of your Form 1040 prep workflow and lean on Thomson Reuters support resources if you need setup or diagnostic help.