The U.S. IRS has announced the interest rates for overpaid and underpaid tax for the calendar quarter beginning 1 April 2023, which are unchanged from the previous quarter. 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 overpayments exceeding USD 10,000 in a tax period is 4.5% on the portion exceeding that amount, and the rate for large corporate underpayments exceeding USD 100,000 is 9%. Revenue Ruling 2023-4, which includes the new interest rates and past rates, will be published in Internal Revenue Bulletin...