Thanks for your reply, that's interesting. I believe the 6% penalty comes from me trying to correct the error in form 8606 from year 2021 when Turbotax mistakenly said my total basis for traditional IRA is $0 when it should have been $6000 since I contributed $6000 to IRA in 2020. It's too late to amend the 2021 return so what should I do now? Do I say this year's basis is $6000 or $12000?
