Texas’ primary election is March 1. Here’s what you need to know to vote.

How do I know if I’m eligible to vote by mail?

This option is fairly limited in Texas. You’re allowed to vote by mail only if:

• You will be 65 years old or older by election day.
• You will not be in your county for the entire span of voting, including early voting.
• You cite a sickness or disability that prevents you from voting in person without needing personal assistance or without the likelihood of injuring your health.
• You’re expected to give birth within three weeks before or after election day.
• You are confined in jail but otherwise eligible (i.e., not convicted of a felony).

What identification do I need to vote by mail?

The Texas Legislature last year created new identification requirements for voting by mail that require voters to provide their driver’s license or state ID number or, if they haven’t been assigned those, the last four digits of their Social Security number on both the application for a ballot and the envelope used to return a completed ballot. If they don’t have either, voters can also indicate they have not been issued that identification.

Hundreds of voters have already seen their applications rejected under these new rules, in some cases because they are providing an ID number that the state doesn’t have on file. As of Dec. 20, 493,823 registered voters didn’t have a driver’s license on file, which is the first number voters are asked to provide on both applications to register to vote and applications to vote by mail. The secretary of state suggests contacting your local voter registrar to ask about how to add one of the required numbers to your voter registration record.

Other voting advocates are suggesting voters include both their driver’s license or state ID number and the last four digits of their Social Security number, if they have both, to avoid issues.

Does lack of immunity to COVID-19 qualify as a disability during the pandemic?

While a lack of immunity to COVID-19 alone does not allow a voter to request a ballot based on disability, the Texas Supreme Court ruled in 2020 that it was up to voters to decide if that lack of immunity, combined with their medical history, allows them to meet the state’s eligibility criteria.

Take note that the Texas election code’s definition for disability is broader than other federal definitions. A voter is eligible to vote by mail if they have a “sickness or physical condition” that prevents them from voting in person without the likelihood of “needing personal assistance or of injuring the voter’s health.” It’s up to the voter to decide this, and election officials don’t have the authority to question a voter’s reasoning.

What kind of postage do I need to return my mail-in ballot?

It depends on where you live. Postage for mail-in ballots will vary by county because the style and size of the ballot could be vastly different from county to county — and some counties may pay postage for you. Local elections offices should have the specifics once ballots are finalized. That said, if you don’t have enough postage, your ballot is not supposed to be returned to you. Instead, the Postal Service is supposed to deliver the ballot and bill the county for the insufficient or missing postage.

What if there’s an issue with my mail-in ballot?

This will be the first major election in which Texas will allow voters to correct their mail-in ballots if they are at risk of being rejected for a technical error, including missing information or signatures. This also applies to issues with the applications for those ballots. County officials are responsible for alerting voters if there is a defect with their application or ballot.

Voters can use a new online ballot tracker to check the status of both their application to vote by mail and their ballot. The tracker can also be used to make corrections. You can access the tracker here.

Disclosure: The Texas secretary of state has been a financial supporter of The Texas Tribune, a nonprofit, nonpartisan news organization that is funded in part by donations from members, foundations and corporate sponsors. Financial supporters play no role in the Tribune’s journalism. Find a complete list of them here.