2020 Amend for 1099-R with code PJ

[GreenDoor11]

I have a 2021 1099-R issued as follows with the code PJ in Box 7. I assume this means that I have to amend 2020's return. With the following details, which figures should be added to Gross income in 2020 1040X? Is it Box 1 (1300) figure or Box 2a (200)?

Box 1. Gross Distribution 1300

Box 2a. Taxable 200

Box 4 Federal Tax Wh/H 20

Box 7 Code PJ

[FangxiaL]

Enter the 2021 1099-R on your 2020 amended return as a 2021 1099-R as you have the option to choose. The Box 2a amount is taxable for 2020, and that is why you need to amend your 2020 return. 

You also need to enter the 2021 1099-R on your 2021 tax return because there is federal income tax withheld. The $200 in box 2a will be added to your 2020 gross income.