The California Entity Number is the identification number assigned to a business entity by the California Secretary of State at the time of registration. A corporation entity number is a 7 digit number with a C at the beginning. A limited liability company and limited partnership entity number is a 12 digit number with no letter at the beginning.
To enter your Entity or SOS number in the TaxSlayer Pro Business program, from the main menu of the CA return select;
- Heading Information
- CA Corporation Number
Additional Information:
All About Business | FTB.ca.gov
2021 Exempt Organization Business Income Tax Booklet | FTB.ca.gov