The U.S. IRS has announced the interest rates for overpaid and underpaid tax for the calendar quarter beginning 1 January 2023, which are increased from the previous quarter due to an increase in the federal short-term rate. The rates are 7% for both overpayments and underpayments by individuals, and 6% and 7% for corporate overpayments and underpayments, respectively. The rate for corporate o…