Since Oct 1, 2023, the Internal Revenue Service (IRS) increased the interest on tax underpayments to 8%, parading a consistent surge since 2021 with only 3% penalty rate before rising to 6% in 2022. And just recently, the IRS announced that the 8% underpayment penalty rate will be kept until the first quarter of 2024. … Continue reading Caution: Huge Underpayment Penalty Alert!