Hello! My wife has made non-deductible traditional IRA contributions over the past few years (since 2020). her income is too high for them to be deducted, but I realized today that she has not been filing form 8606 to note these non-deductible contributions. To be clear, she has not done any back door Roth conversions with any of these funds. what is the best way to rectify this? Does she need to send an 8606 form for each year she did this? Or can I enter the total amount (basis) of her non-deductible contributions on this year’s tax return on form 8606?
If you have filed no Forms 8606 for nondeductible contributions, the IRS may accept a filing of Forms 8606 for all years to establish the correct basis in your traditional IRA.
You don't need to amend your past returns if no other details have changed.
Send the 8606 forms with a cover letter explaining that you omitted to file these forms to the IRS Center where your tax returns would normally be sent.
For 2023 and future years, follow the instructions in this TurboTax Help article to file form 8606 with your tax return.