1) State can only be
....1a) e-filed along with the Federal tax return....or
....1b)...if the Federal tax return was already e-filed separately first, then you must wait for the IRS to "accept" the Federal tax filing before you will be allowed to e-file the State. The IRS is "scheduled" to start their processing the week of 27 January...some day that week.
2) Some states are not accepting e-file submissions yet at all. Depends on what state is involved. Check here:
https://ttlc.intuit.com/community/forms/help/state-forms-availability-table-for-turbotax-individual-...
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Probably a less common problem:
3) If you mail-file the Federal forms, you must also mail-file the State forms too. The states depend on the initial IRS computers checking things out as a first step security measure.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
