What does tienes que escribes mean?

Answer 1

"Tienes que escribes" is not good grammar. "¿Tienes lo que escribes?" would mean "Do you have what you're writing?", perhaps to ask if someone's taking down all the notes or has picked an essay topic. More likely, it's "tienes que escribir", meaning "You have to write" or "Do you have to write?"

Answer 2

"Tienes que escribes" is not grammatically correct in Spanish. If the intention is to say "you have to write," the correct phrase in Spanish is "tienes que escribir."