My wife died in April 2021. Do I still file married filing jointly for tx year 2020?

[VolvoGirl]

Yes you can file a Joint return for 2020 and even 2021 next year.

[fanfare]

Sorry you have to go though this.

Enter her date of death so you will be able to file with only one signature.

You may  or may not be able to e-File.