What this notice is about We haven't received a response from you to our previous requests for overdue tax returns. Questions about your LT18 notice? Chat with us now - we're available online: Monday-Friday: 8 a.m.-10 p.m. ET / 5 a.m.-7 p.m. PT Saturday-Sunday: Unavailable Chat now Actions to take to resolve your account Read your notice carefully: Following the instructions on your notice. Filing missing tax returns: Send your completed return to the address on the notice within 10 days from the date on the letter. Frequently asked questions What if I already filed the return? If it’s been over 10 weeks since you sent us the return, send a signed copy of it to us again. What if I had no employees during the tax period shown on the notice? Please contact us at the toll-free number listed in the notice 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 Filing past due tax returns Get Transcript Paying your taxes Full list of tax forms and instructions Need help? You can authorize someone to represent you before the IRS or inspect and/or receive confidential tax information. You may be eligible for free help from the Taxpayer Advocate Service (TAS). See if you qualify for help from a Low Income Taxpayer Clinic. You can request a copy of your notice or letter in Braille or large print. If you can’t find what you need online, call the telephone number on your notice or letter.