After you file

Okay, last question! Also thank you so much for the help with this guys! 
So after feb 15th or when I receive my full refund and I send in the form to amend my taxes would that “most likely” mean I would owe back taxes? Or would I get more? I’m confused on that part.. if I file an amendment would it be very likely I’d have to pay back some of the amount they gave me?