It is not possible to e-file your state return until your federal return has been e-filed. If you cannot meet the October 16 filing deadline, then after that, you will have to file both by mail. E-filing will close down after the deadline. Users whose e-files are rejected on 10-16 will get five extra days to fix their rejected e-files and try again. But you will not be able to try to e-file for the "first" time after 10-16.
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