After you file

Right.  It will be on the 1099R you get at the end of the year.  You will get credit for it on your return which might give you a Refund.  Now when you rolled the RMD back into the IRA did you send back the net amount you got or the full amount including the tax withholding?  If you didn't replace the withholding then the tax withholding will be a distribution and taxable by itself.