Top 10 Mistakes People Make in Filing a Tax Return

10. Failure to sign return or attach check.

  9. Failure to file estimate.

  8. Failure to advise of address changes.

  7. Failure to file return for the year taxpayer moves in or out.

  6. Failure to allocate taxes paid when allocating income for move-in/move-out year.

  5. Failure to pay 2nd, 3rd and 4th quarter estimated tax payments.

  4. Failure to mail return.

  3. Failure to attach Schedules/Forms and statements.

  2. Failure to attach W-2.

  1. Failure to use qualifying wages.