In order to file for divorce in Texas, at least one spouse has to have been living in Texas for the past 6 months. The spouse will also need to have been living in the county you’ll be filing for divorce in for the past 90 days.
So for example, if the husband is living in Colorado and the wife has been living in Texas for at least the last 6 months and in Travis county for the last 90 days, the couple can file for divorce in Travis county.