I live in CA and have an online job from OR. My w2 shows an OR address, how can I change my address in TurboTax to my CA address?

It’s not clear whether you actually lived in Oregon at some point in the tax year and moved to California, or lived in California all year, but the address information on your W-2 won't affect your taxes and you shouldn’t change the address shown when entering your W-2.  

Just make sure you've entered your current mailing address in the Personal Info section of TurboTax.  This is the address that's important to the IRS.  And when entering your W-2 into TurboTax, be sure to enter the address that's shown on the W-2.

Please see the TurboTax Help articles What if my address on my W-2 is wrong? and How do I change my W-2 info in TurboTax? for additional information.