Not sure what you are referring to when you mention non-taxable supplemental dollars in Box 1. Are you referring to box 1 of your W-2----which was issued by your employer and also sent to the IRS? You cannot change amounts on your W-2 as you enter it. Enter your W-2 exactly as it appears. Or---if you think it is incorrect, you will need to ask your employer about the amount in box 1.
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