What this notice is about We denied your request to extend the time to file Form 5330, Return of Excise Taxes Related to Employee Benefit Plans, because your Form 5558, Application for Extension of Time to File Certain Employee Plan Returns, wasn't signed or was signed by someone who wasn't authorized. What you need to do File Form 5330 or a correct Form 5558 by the due date of the Form 5330. If Form 5330 is filed after the due date of the return (including any extension), the return will be considered late and subject to late filing penalties. You may want to Review the filing requirement for your organization at Retirement Plans. Frequently asked questions Where can I go for more information about Employee Benefit Plans? For more information on Employee Benefit Plans, see Retirement Plans Community. Can I get help over the phone? If you have questions or need help, please call 877-829-5500. Personal assistance is available Monday through Friday, 7 a.m. to 7 p.m. CT. Tips for next year Be sure to sign and mail your Form 5558 on or before the due date of your return. Review the Form 5558 resources at Form 5500 Corner. Reference tools Publication 1, Your Rights as a Taxpayer Notice Topic 651 Notice Topic 653 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.