topic 2025 form 1040-X in Get your taxes done using TurboTax

2025 form 1040-X

user17723008979 — Sat, 28 Feb 2026 18:00:56 GMT

Line 5 of 1040-X does appear to be doing the math correctly. Turbotax is not subtracting line 4b (Enhanced Deduction for Seniors) from line 3. I am using Turbotax Deluxe Desktop for 2025.

Re: 2025 form 1040-X

MelindaS1 — Sat, 28 Feb 2026 18:16:22 GMT

Verify that the enhanced senior deduction factored in correctly onto your original 1040 filing - see Line 13b.

Is the enhanced senior deduction flowing onto Line 4b of the 2025 1040-X in columns A, B, and C? Or is the issue you're seeing isolated to one of the columns: A, B, C? Can you share some of the numbers you're seeing vs. what you'd expect to see for Line 3 minus Line 4b = Line 5?

We'll need specifics to determine if the issue is with the calculation of 1040-X, or if it is elsewhere in your tax return input. If there's a software issue, you may need to send a token of your tax return file so it can be escalated for investigation.

More guidance:

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Here are some things to know before you begin:

Make sure you really need to amend.

Wait until your return has been accepted (or mailed if paper-filing).

Use the same TurboTax account you used to file your original return.

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Any changes you make to amend your federal return will automatically be transferred over to your state return.

Re: 2025 form 1040-X

user17723008979 — Sat, 28 Feb 2026 19:12:43 GMT

Melinda - to answer you questions,:

1. I have $12,000 in 1040-X line 4b in columns A & C which was correctly transferred from my 1040-SR line 13b.

2. The numbers I am getting in 1040 X as an example:

line 1- A = 140,852

2-A = 34,700

3-A = 106,152

4a-A = 357

4b-A = 12,000

5 = 105,795 (= 106,152 - 357, should be 106,152 - 357- 12,000 = 93,795)

John

Re: 2025 form 1040-X

user17723008979 — Sat, 28 Feb 2026 19:14:33 GMT

BTW -I have similar numbers for column C.

Re: 2025 form 1040-X

MelindaS1 — Sat, 28 Feb 2026 21:14:56 GMT

Hold off on filing your 1040-X for now; we're investigating the issue in the software. You'll be updated once any changes are made.