Example: Jill, who works at a retail store, is married and earned $41,000 in 2021. Jill’s spouse was unemployed in 2021 and didn’t have any earnings. Jill contributed $2,000 to her IRA for 2021. After deducting her IRA or pretax 401k contribution, the adjusted gross income shown on her joint return is $39,000. Jill may claim a 50% credit of $1,000 for her $2,000 IRA contribution on her 2021 tax return.