The address on your tax returns is the address you want the IRS to use if they have communication that needs to reach you.
You do not need to amend your tax returns to change an address. There simply is no purpose to that.
For state tax purposes, California will consider where your domicile is.
Domicile is defined best as where you consider your permanent home to be, where you would or will return to as a permanent home.
Tests of domicile include where you own a home, have a drivers license, register cars, and register to vote.
Unless and until you take active steps to break your domicile with California and establish it with another state, California will consider you a resident for tax purposes regardless of any address on your tax return.
The address on your return is just that: an address for someone to send you mail and you to receive it.
TurboTax simply requires customers have a US address to charge their payment to prior to efile.
