If there are no state taxes being withheld from your income reported on Form W-2, boxes 15 through 17 are usually left blank (empty) on the Form W-2.
To work around a blank state ID number, you can try to enter the Federal ID Number as a "replacement" for State ID number. The state ID number has no impact your tax return if it is blank on the W-2.
If the field asks you for a state ID number in a specific "state require" format, such as "6 numbers followed by two letters" you can enter a value that fits that format, in order to complete your return and e-file.
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