If this was a 2018 non-deductible contribution then you should have a 2018 8606 form showing that on line1.
If you did not report the non deductible contribution on a 2018 8606 form (line 1) then you need to amend 2018 to include it.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
