ExpressExtension Support Find answers to your questions. Get Answers Support Form 7004 General How to bulk upload Form 7004 data for multiple businesses? What is IRS Regulation 1.6081-5, and when are businesses exempt from filing an extension? View All E-filing I filed my Form 1120-S by March 15 but haven't paid taxes. What's the penalty and interest? How to file a tax extension for a C Corp? View All Rejection Error Codes [E-File Error Code F7004-904-01] How to resolve it? [E-File Error Code R0000-901-01] How do I resolve it? View All Pay Tax Dues Can I pay the tax dues while electronically filing the extension? What options are available to pay taxes while e-filing Form 7004 with ExpressExtension? View All State Filings When does the payment gets withdrawn from my bank account for the EFW payment option? View All Need more help? Get in touch with our dedicated support team Contact Us (803) 514-5155 support@expressextension.com