Changes to Tax Law after I already filed

I filed my Federal tax return and it was accepted and now new tax law updates have changed my return from me owing to now I should be receiving a refund.  From my understanding it is because of the unemployment taxes I I paid and now the unemployment compensation I received isn't part of my AGI.  What do I need to do?  Do I have to file an amended return?  I signed up for the amount I owed to be debited from my checking account on April 15, will that still happen or what?