This is a code for an Uncollected Tax. It generates from specific Form W2, Box 12 codes entered.
You should check/verify your W2 Box 12 entries for any of these codes:
- A -- Uncollected Social Security or RRTA tax on tips
- B -- Uncollected Medicare tax on tips
- M -- Uncollected Social Security or RRTA tax on taxable cost of group-term life insurance over $50,000 (former employees only)
- N -- Uncollected Medicare tax on taxable cost of group-term life insurance over $50,000 (former employees only)
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