I completed an amended tax return just to correct one of my daughter's last names; however, now it is saying that we are owed a federal tax refund of $0.

I sent in my original 2015 federal tax return that indicated that my husband and I had a federal tax refund but hand-corrected my daughter's last name and initialed and dated the error and mailed it in. Was this okay to do? Also, can my amended tax return that I didn't send to the IRS be eliminated and my original federal tax return for 2015 be kept on TurboTax?