Amended Return E-file or Mail?

[haavisto]

I amended my return today to included a 1099-INT that I missed with a few hundred dollars from interest on cashed bonds. 

The software took me through a bunch of steps including asking what bank account I wanted the slight amount due withdrawn from. But at the end it said I had to print and mail in my amended return with a check.

I received an email saying my return was processing, and then a few hours later that my return was accepted. Is it going to withdraw the money from my account, or do I still need to send in my amended return and a check via mail?