I am missing over $3000 on my accepted return and check was issued by TPG? This has never happened before

It might be that the IRS has offset some of your refund to pay past due obligations such as back child support, past alimony issues, past collections etc. Contact the IRS for further information by selecting the link.

You will be getting a letter from the IRS.  They do not notify TT, but it might be related to the stimulus and/or the Advanced Child Taxx Credit.  Or, the IRS might have adjusted your return for an error, such as a data entry mistake.