Is rental income from another state taxed in CA

[ja5060]

I have rental income from DE but Turbo Tax added to my CA income also.

I've been taxed twice by CA and DE

[jerry2000]

Yes, indeed. California taxes all of your income no matter where you earn it. If you have income taxed in another state (such as DE), then you can get a CA credit for that by filing a CA Schedule S, tax paid to another state with your CA return. You will need to file a DE return for that income and a CA return for your total income.

See this Turbotax item about filing for more than one state:
https://ttlc.intuit.com/questions/1900021-when-would-i-have-to-file-returns-in-more-than-one-state