1.Here is a link regarding the LLC filing requirements, directly from the CA website:
https://www.ftb.ca.gov/file/business/types/limited-liability-company/index.html
Here is the estimated tax payment requirements: https://www.ftb.ca.gov/pay/estimated-tax-payments.html
2.#1 above is regarding estimated tax payments, not sure if you are referring to quarterly 941's, here is the information regarding that. You must file IRS Form 941 if you operate a business and have employees working for you. Certain employers whose annual payroll tax and withholding liabilities are less than $1,000, might get approval to file the annual version—Form 944.
A IRS Form 940 is also filed annually.
https://turbotax.intuit.com/tax-tips/small-business-taxes/what-is-the-irs-form-941/L4mA9LHER
3.Pleas take a look at this article regarding start up expenses. https://turbotax.intuit.com/tax-tips/small-business-taxes/startup-business-tax-tips/L7SOyYMzr
You can use startup tax deductions as capital costs, and you can choose to elect to amortize other costs. Pleas take a look at the article regarding startup expenses.
Thank you,
John
CPA
