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Accepted means received for processing.  It does not mean the IRS accepted/agreed with the amount of your refund, as you discovered.  Wait for a letter from them. They do not notify TT, but it sounds like they denied a Recovery Rebate Credit.  (The message on the ITS website re this is a generic one that lists lots of possibilities.)

 

As for the change on your TT file, did you report a 1099-G for Unemployment?  The program has been updated to reflect the new $10,200 deduction.