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:
A fixed deduction allowed to every taxpayer, except those who may be claimed as a dependent by another person. Extra exemption deductions are allowed for a spouse on a joint return and for each qualifying dependent. A deduction of $3,400 is allowed for each exemption claimed on 2007 returns, but the deduction is phased out for certain high income individuals.