I received my Federal return, but still haven’t received my State tax return. Any reason why? I filed in January.

See:

https://www.ftb.ca.gov/aboutFTB/contact.shtml

If you efiled, you can use this tool to make sure your state return was successfully efiled and accepted:
<a rel="nofollow" target="_blank" href="https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp">https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp</a>

When you log back into your Online account, at the Tax Home what "Return status" is showing there for your state return?