I need to amend 2018, 2019, and 2020 - both federal and state (GA) taxes. I expect an extra refund for all - several hundred $s each.
Can I file (e-file/mail) them at the same time or do I need to wait for 2018 to be processed first and then continue with 2019? And then wait for 2019 being processed before amending 2020?
Reason is: does changing 2018 - when itemizing 2019 - affect 2019 after amend?
Same for 2019 amend - but in 2020 I used standard deductions.
Thx.
