Employer issued duplicate W-2s for life insurance premium paid by employer; I am retired, employer refused to withdraw one W-2

Yes, we need to get your taxable income correct. This is a two step process.

First: input both w2s so the IRS can match up the forms.

Second: subtract one of them back out.

Subtract various  expenses

1. Open to federal income
2. Locate Miscellaneous Income, 1099-A, 1099-C, Start
3. Scroll to the bottom
4. Other reportable income, Start
5. Other taxable income?
6. Select YES
7. Description -whatever you want - duplicate w2 correction
8. Amount, enter your negative amount, use a minus sign in front.
9. Continue

There  is another spot for entering W2 information, you can't have a negative income. The subtraction must be entered in this manner.