How can I efile 1040x for 2023 with TurboTax
Sorry--a 2023 return cannot be e-filed. You will need to print it, sign and date it in ink, and file it by mail.
Do not expect quick results from amending. It can take four months or more for the IRS to process an amended return.
You can watch for information here:
https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1