Hi, it appears from Mary & Renee's comment that if you had already filed 2020 tax return but only missing the non-taxable contribution to TIRA that filling out the 8606 is sufficient (i.e. no need to do 1040x). However, the language from What taxpayers should know about amending a tax return | Internal Revenue Service (irs.gov) also says "The IRS will mail a request about the missing item." I filed my tax return in March, made contribution in April 2021, and yet I have not received anything from the IRS. Should I proactively fill out the 8606 to avoid the $50 penalty or wait ? p.12 of Instructions for Form 1040-X (Rev. January 2020) (irs.gov) says to do so if changing TIRA so now I'm not so sure.... TIA,
