After you file

Check your online account and see if the IRS says they sent it to you last year

 

https://www.irs.gov/payments/your-online-account

 

If the IRS says they sent it but you did not receive it you can ask for a trace

 

LOST THIRD STIMULUS CHECK

https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...

**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.**