Retirement tax questions

By defer, do you mean it was a non-deductible contribution to a Traditional IRA?

What code is in box 7 on your 1099-R?

Is the box 2b total distribution box checked?

What year was it a contribution for?

Did you file a 8606 form reporting the non-deductible contribution in the tax year that the contribution was made if before 2017?
**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.**