Uncollected Tax Reported in Form W-2 Box 12
Box 12 of Form W-2 displays uncollected taxes with the following codes:
- Code A - Uncollected Social Security or RRTA tax on tips.
- Code B - Uncollected Medicare tax on tips.
- Code M - Uncollected Social Security or RRTA tax on the taxable cost of group-term life insurance in excess of $50,000 (for former employees only).
- Code N - Uncollected Medicare tax on the taxable cost of group-term life insurance in excess of $50,000 (former employees only).
When you correctly enter these amounts on the W-2 entry window, they will get identified with the code UT on Schedule 2 Line 8c (In the tax year 2018 it is Line 62 of Schedule 4, and Line 62 of Form 1040 for tax years 2017 and before).
Additional Information:
Instructions for Forms W-2 and W-3, Wage and Tax Statement