The IRS interest rates on underpayments and overpayments had remained unchanged since the first quarter of 2021. Starting April 1, 2022, the IRS interest rates increase by one percentage rate (Rev. Rul. 2022-5). The rates are:
The tax on the investment income in excess of $1,700 (may change after 2007) of a child under age 18, based on the parents’ marginal tax rate and computed on Form 8615.