https://www.votetexas.gov/voting-by-mail/eligibility-requirements.htmlEligibility Requirements
Who can vote by mail?
Voting by mail in Texas is limited to voters who are:

• 65 years of age or older on Election Day;
• Sick or disabled;
• Expecting to give birth within three weeks before or after Election Day;
• Absent from the county of registration during the Early Voting period and on Election Day;
• Civilly committed under Chapter 841 of the Texas Health and Safety Code; or
• Confined in jail, but otherwise eligible.