Hi Tia - 

It's been a while since I did this, but if I recall correctly, with states like CA you can transmit them standalone by: 

1. Go to Profile and check the box for Federal
2. Go to File Return
3. Uncheck "E-file with federal" on the California line, then
4. Uncheck the "Select tax returns to e-file" box on the Federal line.

I believe this is necessary for states like CA where federal return data has to be "e-file ready" in order to send the state return. If you have any PDF attachments make sure they're not set to "send with federal" either, as those can throw a similar transmission failure.