If for NY...depending on the license type...check the following pictures provided by NY:
Sample Photo Documents | NY DMV
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AND, it is not the DMV ID number
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Later Edit !!!!
Some folks (below) are saying it works if you enter ONLY the first three Alphabetic or Numeric characters....no more than that.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
