I created an amendment but haven't mailed it. is it filed? Will it affect my original return?

I did our original federal/state taxes and filed. Later that day we received a 1098 in the mail that we weren't expecting. I created an amendment and printed it out but have not mailed it? Because it was created does this alert the irs or will they only see it if I mail it. should I wait to mail until I receive original returns. The amendment is in our favor, it makes it so that we are owed and extra $385.