Why have I received a partial Refund? IRS Approved Full Refund!

May 11, 2022 I received a partial deposit of 1557.18 from TPG Products Orig. Who is this?

 Federal return: $3,180.00.  

State Return: $353.00.

Total: $3533.00

Where is the remaining $1975.82 and why hasn't TurboTax contacted me?