Not applying to any TX schools was error #1 as a TX resident.
Putting all your eggs in the OOS basket is ballsy, particularly as a TX resident given that many schools will yield-protect figuring that anyone with a choice between OOS school and In-state TX will choose TX.
AMCAS will let you change your mailing address (s) but I'm unclear how state of residence is determined by AMCAS...
"Your preferred address is the address where any physical mail from medical schools will be sent. If your preferred address changes after you submit your application, you can update and save the changes by officially updating your application by selecting the Resubmit Application button. Be sure to keep both your email address and your preferred address current."
"If your permanent address changes after you submit your application to the AMCAS program, you may update the address and then save the change by officially updating your application by selecting the Resubmit Application button."
It might be worth notifying each school with the message that you've changed your address and are now a California resident.