Thank you, @dmertz and others.
I have a followup question.
My 401k has a Pre-Tax and a Roth parts. Can I freely decide how I split my over-contributions over those sub-accounts?
Let me make an example (rounding the numbers for simplicity).
I am picking one of my two 401k accounts to deal with the over-contributions. The total contributed to this account is $20.5K, consisting of $16.5K pre-tax and $4K Roth. My total over-contribution is $13K (because of a different 401k plan from a different employer).
Can I say that my $13K over-contribution consists of $9K pre-tax and 4K Roth?
If yes, do I see it correctly that for 2022's 1040 line 1h I only need to report $9K, because the other 4K are Roth, i.e. the tax has already been paid?
I understand that this is just the 2022 part and that all subsequent withdrawals will be taxed too. I am just focusing on the 2022 part separately to structure the conversation. 🙂
