(you do not need a letter from the ISO verifying your enrollment to get or renew a Texas DL)
The issuing of drivers' licenses in Texas comes under the jurisdiction of the Texas Department of Public Safety (DPS) http://www.txdps.state.tx.us/DriverLicense The Texas Drivers Handbook states that an individual can legally drive with a valid, unexpired driver license from another state or country for up to 90 days after moving to Texas.
What you are required to do to get a license depends upon your age.
If you are under age 25: you will first have to take the 6-hour Texas Adult Driver Education course. This course can be taken on-line. Here is the web site of one provider. http://www.idrivesafely.com There are several different companies that offer the course, but when you pass the final test, this provider will send you a certificate in the mail that excuses you from having to take the written test at the DPS Testing Station.
Take the certificate to the testing station along with the other documents listed below. You will have to take a vision test at the testing station.
If you are 25 or older: go directly to a DPS Testing Station. The Irving station is located at 1003 West Sixth Street, Irving, TX 75060 at Mac Arthur Blvd. (Go to the DPS web site to find other testing stations in the Metroplex.) There you will have to take the written test of Texas driving rules and a vision test. Click here to access Texas Driver's Handbook.
International students are classified as temporary visitors. Those who meet the requirements will be issued a driver license or ID card with Limited Term printed on it. The driver license or ID card will expire when the period of lawful presence expires. If the period of lawful presence is duration of status then the driver license or ID card will expire in one year or the end of your academic program, whichever is sooner.
Proof of Texas residency: Bring 2 of the following
*If you do not have one of these because you are living in someone else's home, the International Student Services Office can provide you a letter to verify your address.
You will then be directed to either take the written test or be permitted to take just a vision exam (if you have a certificate from the 6-hour course described above or have a license from another US state) and sign up for the driving skills test.
Things You'll Need
Verification of insurance
Vehicle in good mechanical condition
Vehicle with valid registration and inspection
You will need to have received your Employment Authorization Document (the EAD) in order to renew your license. Unfortunately, at the present time, Texas DPS does not include the 60-day grace period (following OPT) when renewing licenses.