Can I claim my grandmother as dependent on 2021 tax returns if she got all 3 stimulus checks

Hello, 

I’m going to claim my grandmother as my dependent on my 2021 tax return. But she got all 3 stimulus checks (3rd one included) because that time I’m not planning to claim her as my dependent. She doesn’t receive any social security benefits, she never filed taxes since her income is 0. IRS sent her stimulus money based on info we submitted if I’m not mistaken on form 1040-SR. I’m using TurboTax basic and once I put her info on my dependent section system asked me what amount I received based on letter 6475 (total -$ 1400 in my case) based on this I’m eligible to receive extra $1400 since she is my dependent. Is it still ok to claim her as dependent and do I need to help her to file her own tax return to show IRS she has no income? Please advise on possible scenarios in this case. Thanks.