The U.S. IRS has announced the interest rates for overpaid and underpaid tax for the calendar quarter beginning 1 October 2023, which are increased from the previous quarter. The rates are 8% for both overpayments and underpayments by individuals, and 7% and 8% for corporate overpayments and underpayments, respectively. The rate for corporate overpayments exceeding USD 10,000 in a tax period is 5.5% on the portion exceeding that amount, and the rate for large corporate underpayments exceeding USD 100,000 is 10%. Revenue Ruling 2023-17, which includes the new interest rates and past rates, will be published in Internal Revenue Bulletin...