The document provides an overview of tax compliance deadlines and requirements for startups in Santa Monica, California. Key dates include sending 1099 and W2 forms by January 31st and March 31st, filing Delaware annual reports by March 1st, filing C Corp tax returns by March 15th or September 15th with an extension, and filing various Affordable Care Act compliance forms between May 31st and June 30th. It also lists annual deadlines for California franchise taxes, city business registration, and state statements of information. The document advises startups to consult their tax professionals, as compliance needs vary by individual circumstances.