Deductions & credits

Thanks @fanfare . So here is the thing

2020 - probably filed 8086 with 6k as contribution and basis as 0

2021. - filed 8606 with 6k as contribution and basis as 0

2022 - filed 8606 with 6k as contribution and basis as 0

2023 - didn't file 8606 but contributed 6.5k. I also did an amend due to an error of something else in this year.

2024 - in the process of filing now.

 

Based on this, please suggest the best possible path. What basis should I put in 2024 filing and how do I retrofit for the previous year basis ( where I put a 0) considering that I didn’t file 8606 for 2023. Also, is there a way to check if 8606 was file using the tax transcript? Thanks for your reply.