| A | Uncollected social security or RRTA tax on tips | H | Elective deferrals under a section 501(c)(18)(D) tax-exempt organization plan | R | Employer contributions to an Archer MSA | 
                           
                              | B | Uncollected Medicare tax on tips | J | Nontaxable sick pay | S | Employee salary reduction contributions under a section 408(p) SIMPLE | 
                           
                              | C | Taxable cost of group-term life insurance over $50,000 | K | 20% excise tax on excess golden parachute payments |  |  | 
                           
                              |  |  |  |  | T | Adoption benefits | 
                           
                              | D | Elective deferrals under a section 401(k) cash or deferred arrangement |  |  | V | Income from exercise of nonstatutory stock option(s) | 
                           
                              |  | (including a SIMPLE 401(k) arrangement) | L | Substantiated employee business expense reimbursements (federal rate) | W | Employer contributions (including employee contributions through a cafeteria plan) to an employee's Health Savings Account
                                 (HSA) | 
                           
                              | E | Elective deferrals under a section 403(b) salary reduction agreement | M | Uncollected social security or RRTA tax on taxable cost of group-term life (for former employees) | Y | Deferrals under a section 409A nonqualified deferred compensation plan | 
                           
                              | F | Elective deferrals under a section 408(k)(6) salary reduction SEP | N | Uncollected Medicare tax on taxable cost of group-term life insurance over $50,000 (for former employees) | Z | Income under section 409A on a nonqualified deferred compensation plan | 
                           
                              | G | Elective deferrals and employer contributions (including nonelective deferrals) under a section 457(b) deferred | P | Excludable moving expense reimbursements paid directly to employee | AA | Designated Roth contributions under a section 401(k) plan | 
                           
                              |  | compensation plan (state and local government and tax-exempt employers) | Q | Nontaxable combat pay | BB | Designated Roth contributions under a section 403(b) plan |