If you need to make
an adjustment to a tax return already filed, the only way to do so is via an
amendment. However, not all changes need
to be amended. Please see IRS
Tips On How and When To File An Amended Tax Return to see if you will need
to file one before doing so. If you need
to file an amendment, instructions to do so is found below;
https://ttlc.intuit.com/replies/5114064