After you file

Income you received in 2020 would not be reported on a 2019 income tax return, no matter what income it was.  And the stimulus check will not be taxable when you prepare your 2020 return next year, although you can expect there to be some questions about it when you prepare your 2020 return.

**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**