Incorrect Return amount

[J2Hanson]

When I filed our 2024 return the software showed we would receive a substantial return since we had pre-paid additional withholding.  When reviewed by the IRS they calculated that we owed much more than Turbotax stated effectively wiping out any funds we hoped to receive as a return.  I have read about the issue with the "did you live out of the country" question being checked as "Yes" and upon review ours were checked "Yes".  As we have not lived out of country I found this odd.  I checked these boxes to be "No"  yet it made no difference in the "Return amount"  This is the only deviation I have found.   I am curious as to how TurboTaxes numbers could (1) be incorrect when I originally filed and (2) and how they now reflect the data from the IRS without any change in my form.  I've been using this software for years and my faith in it has been shaken.  I need an explanation as to what has happened.   

[Bsch4477]

We would need to know what the IRS corrected which should be explained on a letter forthcoming if you don’t have it yet. 

[VolvoGirl]

How did you pay the additional amount?  Did you use a form like a 1040ES or 1040V or pay Online?   Maybe the IRS applied it to the wrong year or to something else.   

Do you get Social Security?   Is there an amount on 1040 line 6b or is it 0?  If you have a lot of other income then up to 85% of SS can be taxable on line 6b.   I would compare 2024 to 2023 tax return and see if you had more taxable Social Security on line 6b last year.   Was it missed on 2024?  

[J2Hanson]

Yes The letter said it was due to Social Security. 

We changed the amount of taxable Social Security benefits on your tax return because there was an error in the computation of the taxable amount.

[J2Hanson]

VolvoGirl Yes it was 1040ES and I have verified it was applied correctly.  It appears their tax tables were incorrect?   Line 6B is 0.  I will look at 2023 info for that line.  Thank you.