I just did rollover of traditional IRA to 401K in January 2023 (total $20,000 rolled over, and no money left in traditional IRA any more)
In this month (February 2023), I am planning to do a backdoor Roth IRA for 2022, I am going to add $6000 to traditional IRA which has zero balance at the moment, then convert to Roth IRA.
1. Will Pro-rata Rule be applied on my 2022 tax return?
2. If yes, then $20,000 which I rolled over from traditional IRA to 401K last month is a mix of pre-tax and after-tax money, is my understanding correct?
3. If the $20,000 is a mix of pre-tax and after-tax money, how do 401K company track this information? Will they get this information from IRS or I have to call 401K company, and let them know the ratio of pre-tax and after-tax for the $20,000?