amend a return

I e-filed my federal taxes but mail my state taxes.  I got an interest statement in and discovered a missed deduction after I efiled my federal and had to amend it.  However I had not mailed my state return yet.   Do I process the virginia amendment and send in both the original and the amended state return together or just send the amended version.  Not sure how to get this state situation properly into turbo tax.    It seems to be forcing me to amend the original return even though comments on the subject I am reading in turbo tax indicate if it wasn't mailed it should just be changed and not amended