Yes, Box 12, code J represents your NYS disability wich is a nontaxable sick pay benefit. Box 14 is an information box about your employers short term disability benefits paid.
Since that information is on your W-2, it sounds like the income is already included on your employer's W-2. However, since you also received a W-2 from the insurance company it would be a good idea to verify that the payments are included in your employer's W-2 before you finalize your return so that you don't duplicate that income.
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