Both of us work and when filing my Maryland tax return it asks me about the two income marriage deduction. It auto filled a set dollar amount under my name but wants me to add an amount under her name. Where do I find that amount?
Per the Comptroller of Maryland: Maryland provides a deduction for two-income married couples who file a joint income tax return. When both you and your spouse have taxable income, you may subtract up to $1,200 or the income of the spouse with the lower income, whichever is less. The income can be from wages, pensions, or business income.
Here is a link to the Maryland worksheet to calculate which income is lower (the amount for your spouse to enter into TurboTax should be the amount calculated on line 5 of the worksheet in the link): Maryland - Tax Subtraction for Two Income Families
Yes, you can claim this deductions if you're both full- or part-year residents of Maryland and are filing Form 502.
See the TWO-INCOME MARRIED COUPLE SUBTRACTION WORKSHEET (13D) in the Instructions for Maryland Resident Income Tax Return with Form 502, found in 2020 Individual Income Tax Forms for more information.