Nov. 2 is a vote on constitutional amendments 

A statewide election on Nov. 2 features 8 state constitutional amendments that address topics ranging from religious freedom to taxes to judicial eligibility.

OCT. 4 - The last day to register to vote.

OCT. 18-29 - Early voting.

OCT. 22 - The last day to apply for a ballot by mail.
The Texas Tribune has everything you need right here. For more info on voting, see:

EVERY ELECTION, EVERY VOTE IS IMPORTANT FOR DEMOCRATS!