How can I find out who is claiming me as a dependent?

Have you gotten a form telling you that someone has claimed you? I read where you get instructions on how to contest this. I don't get the impression the IRS tells you who put in the claim. So all I can see is you contesting it. The person claiming you has to prove they supported you over 50% of what ur income is. So if you bring in 20k a year, they have to prove support over 20k on their part. Thats how I understand it. Your the victim here. IMO, your filing should stand and the other person has to prove it. But, you probably will not get your tax refund until there is an investigation. As you will read below , looks like you need to berelated. So look to ur relatives. Are you living with a child or a sibling? Did u give permission for them to claim you. As u will read below, there is certain criteria that has to be met.

"You can claim adults as dependents on your taxes if they meet the criteria for qualifying relatives. Many people care for elderly parents and claim them as a qualifying relative dependent. Likewise, you can claim a domestic partner on your return as a dependent as long as they meet the requirements.May 17, 2023"

"How do I know if someone claimed me as a dependent on their taxes?

If this is the case, you'll likely find out when you file your income tax return. You'll receive an error stating your or your dependent has been claimed on either their own tax return or someone else's if you e-file your return. If you paper file, you'll get a mailed notice from the IRS."

Source: https://www.mybanktracker.com/blog/taxes/claimed-dependent-wrongly-308108#:~:text=If%20this%20is%20the%20case,mailed%20notice%20from%20the%20IRS.

What makes you suspect you are being claimed as a dependent? If you are worried do call the IRS and ask them this question.