Yes, you can amend a tax return if you need to correct an error, include information that was not previously included, or if you have to make certain changes to your income, deductions, credits, filing status, or number of dependents.
Generally, you must file Form 1040-X within three years from the date you filed your original tax return or within two years from the date you paid the tax, whichever is later. If you filed your return early (e.g., before the April deadline), the 3-year period begins on the regular due date of the return (usually April 15).
Before you decide to amend a return, check to see if the tax agency will correct minor errors or process missing forms for you. Some issues might be resolved through a notice from the IRS, and you may not need to file an amended return. However, for major changes, an amendment is necessary. Always consult a tax professional if you need assistance with amending your tax return.