After you file

@MrCollin  Only the IRS can tell you the reason for the hold up, but it's possible that the IRS never received the employer's copies of your W-2 forms, or that they never got the actual taxes withheld (dollars).  Or maybe you were selected for  random audit.

 

Going forward, you can change your withholding so that you do not have to wait for a refund at tax time.