Your 1099-R is improper. The payer should issue a corrected 1099-R.
If the IRA/SEP/SIMPLE box is checked then box 2a MUST be the same as box 1 and box 2b (not determined) checked.
https://www.irs.gov/instructions/i1099r#idm140339525782928
Traditional, SEP, or SIMPLE IRA.
Generally, you are not required to compute the taxable amount of a traditional, SEP, or SIMPLE IRA nor designate whether any part of a distribution is a return of basis attributable to nondeductible contributions. Therefore, except as provided below or elsewhere in these instructions, report the total amount distributed from a traditional, SEP, or SIMPLE IRA in box 2a. This will be the same amount reported in box 1. Check the "Taxable amount not determined" box in box 2b.
**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.**
