On my original 2024 return, I paid $x. I amended my 2024 taxes, and on line 16 of 1040-x, turbotax entered $153 lower than what I paid. No late fees. Why the difference?

[elizabethelmoreesq]

Hopefully the above details describe the situation, but I'm happy to provide more.

[VolvoGirl · Accepted solution]

Check your 1040 did you have a penalty amount on line 38?  That is included in line  37 but is not included on the amended line 16 payment.

[elizabethelmoreesq]

You are amazing. In a few words, you quickly answered a question that two TurboTax experts in a total of 60+ minutes of phone conversations could not answer (and weirdly refused to answer - the second guy said it was probably based on some schedules and worksheets, but refused to tell me which). You are exactly right.

I'm sorry, but I have a follow up. Line 38 shows the exact $153 difference. But it doesn't say what it is based on. I paid my taxes early. I do have estimated tax payments, but I don't think those would have been low - and anyway, I can't figure out where/how it was calculated.

Thank you again!!!

[elizabethelmoreesq]

I looked, and there's no Form 2210 in my return.

[fanfare]

Penalties:
"1040-x Line 16: Subtract any penalty from the amount you owe reported on original 1040.
Don't try to include, but ignore, any new or changed penalty."  --- IRS

IRS will calculate your new penalty, if any,  on their own and will bill you.

@elizabethelmoreesq 

[fanfare]

Even paying "amount you owe" early,

you can be penalized for failing to meet the "Required Annual Payment" via withholding and/or Estimated Tax Payments on time.

@elizabethelmoreesq