There are a number of different overpayment interest regimes[1]. Mine was paid based on time elapsed from the time of overpayment (overpaid quarterly estimated

There are a number of different overpayment interest regimes[1]. Mine was paid based on time elapsed from the time of overpayment (overpaid quarterly estimated taxes). [1]: https://www.irs.gov/payments/interest#pay https://www.irs.gov/payments/interest#pay