If your daughter filed last year saying no one could claim her as a dependent, and you amend your own return from last year claiming her as a dependent, that’ll raise a red flag.
That’s not meant to discourage you from amending, if that’s actually the fact scenario, but your daughter would also need to amend, saying she couldn’t be claimed on someone else’s return.
I believe I’m understanding your question but, if not, please advise.
