The e-book doesn’t cover state payroll tax return preparation specifically, sorry.

For all states, not just California, you want to (a) determinate whether the state requires payroll tax returns for shareholder-employee-officers… and then (b) stay up to date on the current rules.

If you operate in a state that requires payroll tax returns for shareholder-employee-officers, therefore, you can use the “five minute payroll system” but many small business owners will probably conclude in that case that paying Gusto or Paychex or ADP $500 to a $1000 a year for the payroll service is a better deal.

I want to know how to file online for one employee in CA in 2018.

You are required to use e services for business.

Does your book cover that?