The Internal Revenue Service (IRS) reports that many taxpayers make simple errors on their returns. While those who file electronic returns tend to have fewer errors, there are still many taxpayers who improperly report their taxable income or incorrectly claim credits and deductions. The use of a tax preparer, such as a CPA or an enrolled agent will help, but every taxpayer should understand how to avoid these common errors.

1. Filing Too Early — While most taxpayers understand they should not file after the April 15, 2025, deadline (unless they have requested an extension until October 15, 2025), it is also important to avoid filing too early. Taxpayers should ensure that the IRS has opened the filing period for the tax year in which they are filing for. Filing too early can be problematic, as some taxpayers may not have received all their tax forms, such as Forms W-2, Forms 1099 or other documents required for proper filing.
2. Wrong Social Security Number — The IRS software will check your Social Security Number (SSN). It should be the same as the number that appears on your Social Security card.
3. Name Spelled Wrong — Taxpayers must list their name on the tax return. Your name should match the information on your Social Security card or other valid government identification card.
4. Error in Income — Taxpayers who manually enter their wages, dividends, bank interest or other income frequently make errors. All entries made should be carefully checked. The entries are necessary to correctly calculate credits or deductions.
5. Incorrect Filing Status — The Interactive Tax Assistant (ITA) on IRS.gov may be helpful if you are not certain about your filing status. Income tax standard deductions and some exemptions will vary depending upon whether you are filing as a single person, a married couple or head of household.
6. Math Mistakes — The most common mistake taxpayers make is an error in addition or subtraction. Taxpayers using online software and filing electronically will usually avoid these miscalculations.
7. Wrong Credit or Deduction — The Earned Income Tax Credit (EITC), Child and Dependent Care Credit (CDCC) and Child Tax Credit (CTC) are complicated. The Interactive Tax Assistant may help determine eligibility for a specific credit or deduction.
8. Incorrect Bank Account Number — Most taxpayers who file electronically have their refund sent to their bank account. However, taxpayers must correctly type the routing and account numbers to ensure the funds are sent to the proper account.
9. Unsigned Tax Return — Taxpayers who file a paper return are required to sign the return. A joint return must be signed by both spouses. A common mistake occurs when one spouse forgets to sign the return.

Editor’s Note: Many of these errors are avoidable with the use of online software and electronic filing. If you use online software, it will check your return and avoid most of the common filing errors.