What do the codes in box 12 of W-2 mean?
What do the codes in box 12 of W-2 mean? Box 12 codes A: Uncollected social security or RRTA tax on tips reported to your employer. AA: Designated Roth contributions under a section 401(k) plan. B: Uncollected Medicare tax on tips reported to your employer (but not Additional Medicare Tax) BB: Designated Roth contributions under a section 403(b) plan. What code do I use for box 12? Box 12 CodeDescriptionBUncollected Medicare tax on tipsCTaxable cost of group-term life insurance over $50,000DElective deferrals to a section 401(k) cash or deferred arrangement. Also includes deferrals under a SIMPLE retirement account that is...