Solved
Is it too late to file a claim if I have already filed my taxes and received my refund?
If you've already filed you have to amend your turn to make any changes. You cannot e-file an amended return. They have to be mailed, and it takes about 16 weeks for the IRS to process an amended return. 3 weeks after you mailed your amendment, you can start tracking its progress at the IRS Where's My Amended Return? site. Instructions can be found here: https://ttlc.intuit.com/replies/5114064
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