If you had less than $4300 of income in 2020--NOT counting Social Security--and she paid for over half your support she might be able to claim you as a dependent. All she "gets" is the $500 credit for other dependents for claiming you. Or if she paid your medical expenses she might be able to enter those as an itemized deduction.
IRS interview to help determine who can be claimed:
https://www.irs.gov/help/ita/who-can-i-claim-as-a-dependent
https://ttlc.intuit.com/questions/3113432-who-can-i-claim-as-my-dependent
If you CAN be claimed as a dependent on someone else's tax return then if you prepare a tax return for yourself you have to say on your own return that you can be claimed as a dependent.
**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.**
