If you have already filed your return then yes you will need to file an amended return.
Use Form 1040X, Amended U.S. Individual Income Tax Return.
Be advised – you can’t e-file an amended return. A paper form must be mailed in.
TurboTax can guide you through this
-for additional information follow this link-
How to File an Amended Tax Return with the IRS - TurboTax ...
