1 Under new law, most local entities now have a “first day” to file.. For the few entities who do not have a first day to file: For the May 2, 2020 election, Wednesday, January 15, 2020 is the deadline to post notice of candidate filing deadline for entities that do not have a first day to file for their candidates.
https://www.sos.texas.gov/elections/voter/2020-important-election-dates.shtml

