How do you qualify for the two income marriage deduction

[DawnC]

If your state has the deduction, you will claim it when you file your state return.   If this is for Maryland - you can claim the two-income married couple subtraction on your Maryland Form 502 (TurboTax will include the deduction).   This is a state-only deduction that reduces your taxable income.   Married couples filing a joint return, when both have taxable income, may subtract up to $1,200 or the income of the spouse with the lower income, whichever is less.   See Marylandtaxes.gov

If you are asking about a different state, reply back.