Hi gyou0818,
Schedule OJC is a MA state form to report that you have filed a return and paid taxes in the other state - name of other state, amount of income on which you paid taxes, and total tax due before credits, W-2 withholding and payments.
Therefore, the two-letter state or post codes needs to be non MA, In your case, it is likely CA. Suggest to "Go over MA state again" and correct accordingly.
Hope the above helps. Thank you.
Kochu Kitty
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