You should double-check that your business information, the name of your business, and your EIN. Once you make sure the information another reason that the extension can be rejected is that the EIN is the same as an EIN of a previously accepted electronic return for the return type and tax period and type of Return Code indicated for the tax return type. If this is the case, the IRS helpdesk encourages you to contact them via telephone at 866-255-0654. They can assist you in resolving this issue and allow you to successfully e-file this extension. If the reject persists, you will need to file the extension on paper.