@ jeffgiali
I'm just curious. This may or may not apply to you. If it doesn't, then ignore it.
Did you have any unemployment income in 2020 and filed your 2020 return early in tax season before the late tax law (mid-March 2021) was passed (American Rescue Plan Act) about the "up to $10,200" exclusion of unemployment income? I believe the IRS adjusted those returns later.
I've seen a couple of users say that the IRS had adjusted the 2020 AGI on their books later in filing season due to the excluded unemployment income, so the IRS figure for 2020 AGI was the adjusted amount lower.
That's all anecdotal, however, so I don't know if it would help or not. I guess it's certainly something to try for folks in that predicament who did have an unemployment income exclusion after they filed their original return; i.e., lowering the AGI by the amount of exclusion they qualified for.
