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If you accidentally answered NO to "can someone else claim me as a dependent" on your original return, you COULD change that on your amend. (what you are probably doing)
Your dad will need to wait until the IRS completely processes your amend before he will be able to claim you as a dependent, but you are running out of time.
Your father could go ahead and file not claiming you, and you still do the amend (saying someone else can claim you).
Once your amend is processed, then your dad can do an amend claiming you.
