Yes----if he already got the $1200 then he could still only get $600 as a recovery rebate credit on a 2020 return. If you are not sure what he received you can check the IRS account online. That will show the stimulus payments that were issued for his SSN.
https://www.irs.gov/payments/your-online-account
**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.**
