The form says we have changed the your 2021 for 1040 to match our record of your estimated tax payments, credits applied from another tax year and/or payments with an extension to file. As a result you xxx $.
I am now trying to match what they have sent with with what TT calculated. AGI and taxable income match. I will report back if I spot the discrepancy.
Looks like there was a discrepancy on my side. I had incorrectly reported an estimated tax payment on my return. Should I just send the amount due or submit and amended return?
If IRS billed you, respond with the payment.
That's the end of the matter.