 Income tax 2021-2022, IRA deduction. Get ready to get refunds to the backs, diving into income tax 2021-2022. Most of this information can be found at the Form 1040 Instructions Tax Year 2021 found on the IRS website, irs.gov, irs.gov. Here's the income tax formula focused on the adjustments to income. You might hear called the above the line deductions, the Schedule 1 deductions for adjusted gross income, keeping the adjustments to income, or those above the line deductions distinct in your mind from other deductions, such as the standard deduction or itemized deduction. Here's page one of the Form 1040 focused on line number 10, adjustments to income from Schedule 1. Here is the Schedule 1 part number two. We're down here, line number 20, the IRA deduction. The total of this form, of course, going back.