Before 2020: I only contributed to Roth IRA (I did not even have traditional IRA account), I think it does not need to be reported on tax return. I just used tax software, and I don't think it asks about Roth IRA contribution.
Year 2020: I contributed to both Roth IRA and traditional IRA, and I only reported traditional IRA contribution. At the end, the system generated form 8606 for traditional IRA contribution part, since it is not deductible due to my income.
Year 2021: I only contributed to Roth IRA.
Year 2022: I am planning to contribute to traditional IRA (different financial institution from year 2020 traditional IRA contribution), then do backdoor Roth conversion. At this point, I am not sure if I am qualified for Roth contribution (not sure about income, salary only can qualifies me for Roth contribution, but not sure about stock trading performance till the end of year), therefore, I am planning to do backdoor Roth conversion now.
Question: I thought form 8606 is cumulative amount, but I don't have form 8606 for year 2021, how can I carry 2020 form 8606 amount to year 2022 tax return form?
To be simple: How should I fill out 2022 tax form based on above scenario?
Thanks.
