Another user recently posted that he almost threw out his check from SBTPG because the envelope it came in looked like junk mail. Any chance that you (or someone else in your household) may have done that?
Going forward, you can avoid all this (and save the extra charge) by paying your TT fees upfront with a debit or credit card. Also consider changing your withholding so that you do not have to wait for a refund at tax time.