What this notice is about We credited payments and/or other credits to your tax account for the form and tax period shown on your notice. However, we haven't received your tax return. What you need to do If you are required to file this tax return please file today. Send your signed tax return to the address shown on the top of this notice. Frequently asked questions What if I have already filed this return? Please send a newly-signed copy to the address shown on the top of your notice. What if I want the credit transferred to another tax form, tax period or tax identification number? Please call us at 800-829-8374 to give us details of the account to which the credit should be transferred. Reference Tools Publication 5027, Identity Theft Information for Taxpayers PDF 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.