The phrase "refund money" refers to giving back the money someone has paid for a product or service because it was not satisfactory or the person changed their mind. Full definition
You want to have minimal — if any — tax refund money in your bank account on the day that you file your bankruptcy. (natlbankruptcy.com)
In case the writer is at fault, the client is refunded the money in full amount. (paramountessays.com)
If a student is required to file taxes and receives a refund, I would advise using 10 — 25 % of refund monies to pay student loan interest at the very least. (thecollegeinvestor.com)