Yes, you should amend, becasue Code B in box 12 of your W-2 represents uncollected social security and Medicare tax on tips. This means your taxes could be increased by the incorrect figure placed on your original W-2. Look on your Form 1040, Line 58 to see how this incorrect figure affected your original return. Then see the FAQ below for instructions on amending. https://ttlc.intuit.com/replies/3288565