CA State Nexus Creation

I am a WA State based single member LLC. I only do business in the State of WA. I hired my cousin to help with a few piecemeal projects during 2022,2023, 2024 & 2025. I received a form 4694 ENS asking me for status of the CA State tax return 568. I didn't understand this was a requirement since my business never earned income from any source in the State of CA. Do I have to report my entire years of income for my WA State business? nothing was CA based. My employee worked on some marketing piecemeal projects, how do I determine income on that? she only earned a total of $14,200.00 during the last 4 years. 2022 W2 is $8000.00, 2023 W2 is $2800.00, 2024 is $2650.00 and 2025 is $750.00. Can you advise how I calculate what to report to CA State? or do I just pay the minimum required tax of $800 for each year?