What this notice is about We approved your Form 1128, Application To Adopt, Change, or Retain a Tax YearPDF. What you need to do Timely file a short period annual return for the tax year ending shown on Form 1128. You may want to Keep this notice for your permanent records. Frequently asked questions What is Form 1128? When approved, this form allows a taxpayer to change the date on which they close their tax year. Partnerships, S corporations, personal service corporations (PSCs), or trusts may be required to file the form to adopt or retain a certain tax year. Reference Tools Publication 1, Your Taxpayer Rights Publication 5027, Identity Theft Information for TaxpayersPDF Full list of tax forms and instructions Need Help? You can authorize someone to contact the IRS on your behalf. See if you qualify for help from a Low Income Taxpayer Clinic. If you can’t find what you need online, call the IRS number at the top of your notice or letter.