noun
tax refund
Refers to the return of overpaid taxes; a formal term used in tax contexts.
確定申告をすると、税金還付を受けられる場合がある。
When you file a tax return, you may receive a tax refund.
還付金 is a more general term for a refund (not limited to taxes), while 税金還付 specifically means a tax refund.
Compound of 税金 (tax) and 還付 (refund, return of money).