Re-import of a previous year's amended return?

[harris_shapiro]

While working through my 2022 tax return, I realized that when filing my 2021 taxes, I'd inadvertently missed reporting some income.  After completing an amended return for 2021, I discovered that there doesn't seem to be a way to transfer the updated previous year's return into the in-progress return for this year.

Since I'm almost done with my 2022 return, it would be very tedious to have to throw everything out and start from scratch, just to import a small number of amendments from 2021.  Does anyone know of a way to avoid having to do so?

[DoninGA]

Very few tax items from a prior year tax return will carryover to the current year return.

What did you change on the 2021 return that you think will affect what you have already entered on the 2022 tax return?

[harris_shapiro]

The main amendment was to add in missing 1099-B and 1099-DIV forms (long story on how those were missed...).  These added enough previously unreported income that a small 2021 federal refund became an underpayment, and the size of my state refund was smaller.

The same problem that resulted in the missed forms in 2021, also resulted in me owing some federal tax in 2022.  In the 2022 return, this popped up questions asking about:

a)  2021 tax liability for Form 2210

b) 2021 Adjusted Gross Income

which displays the old (now incorrect) 2021 information.  It seemed I could manually fix these two issues by entered the amended tax liability, but it made me concerned that there were other (less obvious) updates that might need to be made, e.g. to ensure that any 2023 estimated tax payments were done correctly.