Complete your amended return as if you are filing the return for the first time. Submit all the forms relevant to the information in your amended return.You must file Form 1040X within 3 years after the date you filed your original return or within 2 years after the date you paid the tax, whichever is later. You can amend your return at any time, but to claim a refund, the amended return must be filed within three years from the original due date of the return. You can now file Form 1040X electronically with tax filing software to amend your Form 1040, 1040SR, or 1040NR for the current or two prior tax periods. The Franchise Tax Board will send a notice or letter to personal taxpayers and business entities for issues that may include but not limited to: Below is a checklist of what you need to file your 2024 tax return at an NYC Free Tax Prep site. Blue icon of an id card. This interview will help you determine if you should file an amended return to correct an error or make other changes to your return. In most cases, if you originally filed IRS Form 1040, you should use Form 1040-X to file your amendment.