When the IRS refers to "offsets," it means back child support, Federal taxes, etc. that are being paid from a seized Federal refund. So when they tell you that you have no offsets, it's referring to those.
However, the IRS can also make "adjustments" for things like data entry errors, forgotten income, or misclaimed deductions/credits. That is more likely what's happening. The IRS does not notify TT nor TPG when they do this, so watch for a letter in the mail from the IRS in 2-4 weeks. There have been a lot of taxpayers making errors when claiming the stimulus or Child Tax Credits.
