Yes, the regular filing deadline this year is April 17 because the 15th is Sunday and Monday the 16th is Emancipation Day in DC.

Nick, it wasn't made clear if your daughter incorrectly claimed an exemption for herself. If the box(if it was Form 1040)wasn't checked, as you stated, then she(correctly)didn't claim an exemption for herself.

-----------------------------------

Enjoy the music, not the equipment.