Can I add my 2020 form 1099-B which is for sales of Stocks to my 2021 tax return? I didn't file them on my 2020 return and need to get it done with my 2021 return.

[VolvoGirl]

Sorry no.   You need to amend your 2020 return to add it.

[AnnetteB6 · Accepted solution]

To reiterate the Champ VolvoGirl's answer, you will need to amend your 2020 tax return to report your 2020 stock sale information on that tax return.

If you are showing an overall loss with your 2020 stock sales, you may want to go ahead and amend your 2020 return before filing your 2021 tax return.  It is possible that you may have losses to carry forward from 2020 to 2021 that would affect your 2021 return.  

Take a look at the following TurboTax article for instructions to amend the 2020 tax return:

How do I amend my 2020 return?

@aklady907