There is an error in TurboTax software with the California SOS file numbers. Contrary to TurboTax software, corporations in Cal have a 7 digit entity number issued when the corporation is registered with SOS and it starts with letter C. Those numbers can be looked up on the SOS's business search athttps://businesssearch.sos.ca.gov/
LLCs do have a 12-digit numbers issued by SOS and they start with a year in which the LLC was formed. So if your LLC was formed in 2017, like mine was, the number will start with 2017....
On the other hand, my corporation SOS number starts with C and then has a 7-digit number following letter C. When I tried to file my taxes with TurboTax for Corporations, the software did not allow me to enter my corporate number and continued to request a 12-digit number starting with 19 or 20, WHICH MAKES NO SENSE. It also did not allow me to override the TurboTax's settings. I refused to file by Mail, I purchased TurboTax specifically so that I could e-file. So I had to call customer support and spend about an hour of my time trying to resolve the issue. The person on the phone finally agreed that I was right but he was unable to resolve my issue with the filing. Eventually, I solved the issue myself by entering all zeros instead of any number, and the e-filing was allowed to proceed. I hope that TurboTax will fix this issue immediately. It is an egregious mistake that cost the filers much time unnecessarily.
I even started doubting myself for a minute, and I called the Cal. SOS office. They confirmed that corporations in CA have 7-digits numbers ONLY, and LLCs have 12-digit numbers.
