How to submit a W2 to the state of California
In 2019, the state of California does not accept W2s electronically. They require a DE9 form. This website may give you additional information on how to file with the state of California. www.edd.ca.gov
The information below is from the 2019 California Employer's Guide https://www.edd.ca.gov/pdf_pub_ctr/de44.pdf
Electronic Reporting and Payment Requirement: As of January 1, 2018, employers must electronically submit employment tax returns, wage reports, and payroll tax deposits to the EDD. For more information on the e-file and e-pay mandate and related noncompliance penalties, visit www.edd.ca.gov/EfileMandate
Review your current state tax filing requirements for up to date information on filing requirements.