What is the leagal age in Texas that a biological parent can contact an adopted child that the biological parent lost parental rights to?

Answer 1

When they are considered adults, age 18.

Considering a 18yo is still very much a teen though and have lots of growing up to do i would suggest you contact the parents first to find out how the child is and has been during these years. You don't want to shock the child, especially if the child does not know they are adopted. Send the parents a letter and include a letter in it to the child. Let them tell him/her you are looking forward to meet them. Letters can be a great start since you can really think about what you want to say there.