Extension Form For 1120S - Web in the case of an 1120, this is the 15th day of the 4th month after the end of the tax year of the return. How to file the 7004 extension. Web electronic filing an extension for business returns (1120, 1120s, 1065, and 1041) solved•by intuit•196•updated over.
Web electronic filing an extension for business returns (1120, 1120s, 1065, and 1041) solved•by intuit•196•updated over. Web in the case of an 1120, this is the 15th day of the 4th month after the end of the tax year of the return. How to file the 7004 extension.