One reason that you may not have been able to e-file your state return is that the federal return must first be "accepted" by the IRS before the state can be e-filed. Only you know the e-filing status of your federal return. Has it been accepted? Check the status of your e-filed federal return here .
If your federal return has been accepted, follow the instructions I'm linking below to e-file your state return. Please post back if you continue to have difficulty.
How do I e-file my state after I already filed my federal?
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