Just got another W-2. I've already filed my return. What should I do?
Wait until the IRS has processed your return and sent your refund (if any). Then wait two to three months to see if you receive a letter from the IRS revising your original return. This happens fairly often for unreported income. The IRS will recalculate the tax you owe and send you a bill. This is a fairly easy process and a lot less hassle than preparing an amended return, which has to be printed and mailed (no e-file).