See if this works:
In the Personal Info section of TurboTax, be sure you entered California as your State of Residence.
Go back to the federal W2 section and click on Edit your W2.
In the State section of the W2, click on +Add another state.
Add California in Box 15. In Box 16 on the new California line, enter the amount from Box 1 of your W2 as your California wages/salary. Then click continue until the section finishes.
When you're done, the amount on Line 12 "State Wages" of your California Form 540 should be the total
amount from Box 16 of each of your W-2's.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
