Yeah but they might have really been your dependents. They might have filed WRONG. You probably needed to claim them last year. All of you probably need to amend.
This is for 2021 but is similar for 2020.
Who can I claim as a dependent?
https://ttlc.intuit.com/community/credits-and-deductions/help/who-can-i-claim-as-my-dependent/00/267...
Who you can claim article
https://turbotax.intuit.com/tax-tips/family/rules-for-claiming-a-dependent-on-your-tax-return/L8LODb...
