Full credit is a relative term as it depends on the state giving the credit rather than where you paid it. The credit will be the lower of the state tax liabilities on the same taxable income.
It gets even trickier when the states use different amounts for the taxable income. Again, the lowest taxable income is used.
The end result is the least amount of tax credit on the least amount of taxable income.
You should consider making an estimated payment or two to the state during the year due to the difference in credit allowed. You can pay MD online at Pay It!
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