I filed my Texas taxes with TurboTax for 2019 but I have now received a notice with the state of California tax franchise board that I owe back taxes. What can I do?

I worked for a company that is based out of CA but I worked and lived in the TX division the whole time. Now they’re saying I owe and I must file a 540 NR form within the next 30 days or they will put a lein on my accounts. Spoke w former employer and they have never required this of us.