Already Filed, and paid Federal Tax, do I need to file an amended tax return

I already filed my taxes and had to pay Federal Tax.  They already took the amount out of my bank account.  Now with the changes made to EDD, I ran TurboTax again with the new updates and my amount owed is a lot less.  If I read correctly, the IRS will make this adjustment and put money back into my bank account without me having to do an amended tax return?