What this letter is about We have not received a response from you to our previous requests for overdue tax returns. What you need to do Mail your return to the address on the letter within 10 days from the date on the letter. If you’ve already filed, call the telephone number listed on the letter. If you’re not required to file, call the telephone number listed on the letter. You may want to Call us for assistance at the toll-free telephone number listed in the top right corner of your letter. Frequently asked questions What if I already filed the return? If it’s been over 10 weeks since you mailed it, send a signed copy of it to us again. What if I had no employees during the tax period shown on the letter? Please contact us with that information. Tax publications you may find useful Publication 15, Circular E, Employer's Tax Guide PDF Publication 15-A, Employer's Supplemental Tax Guide (Supplement to Circular E, Employer's Tax Guide, Publication 15) PDF Reference Tools Publication 1, Your Rights as a Taxpayer 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.