@RWhyte
No,that is not allowed.
The wording says if someone "can" claim you as a dependent, you are not eligible.
If you file your 2019 and chose not to add him as a dependent, it does not change his status. You should go ahead and claim him and get your $500 dependent credit.
Under the CARES Act, if he can be claimed as a dependent on someone else’s 2019 return, he cannot receive a stimulus check, in 2020. However, if he were claimed as a dependent for 2019, but will not be for 2020, he will, most likely, get it in 2021.
"In essence, the stimulus check acts as an advance of your 2020 income tax refund. This means when you prepare your 2020 income tax return, there will be a line to include the section 6428 credit. The credit on your 2020 return is subtracted by any amount received as a stimulus check in 2020. If the amount you received as a stimulus check is less than the credit you are due, the difference will be included as part of your 2020 refund. If you have been overpaid by receiving the stimulus check, however, you will not be required to return any excess amount".
Reference: https://www.dailylocal.com/news/coronavirus/what-does-the-stimulus-check-mean-for-your-taxes/article...
