10a - should probably "OK" (without the quotes).
10b - We in the Community do not know what the state identification number of Oklahoma is, but it is likely to be the same or similar to the Payer's Federal Identification Number on the left.
11 - yes, box 11 should be the amount of state tax withheld.
Note that if there is no state tax withheld, you should make sure to blank out 10a and 10b.
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