Find a form for the Texas crash report on line, fill it out, and send it in. When your car it totaled, you get the value of the car before it was totaled, not the cost to replace it. So tax and registration are not available. If you were hurt, be sure to seek medical treatment and retain a lawyer.
This is not legal advice. You should always discuss the specifics of your issue in person with an attorney. Be aware that there are time limits on all claims that depend on the kind of claim, so do not delay in seeking an attorney.