This sentence could mean one of two things
I don't have to do anything. As in, it's going to take care of itself.
I don't want to do anything.
For "I do not have anything to do" you would say "Mere pas karne ke liye kuchh nahi hai"
Now the choice between 1 and 2 is based on the context of the conversation.
Good use of option 1 would be "maine khat bhej diya hai. Ab mujhe kuchh nahi karna hai."
"I have sent the letter. Now I do not have to do anything."
Good use of option 2 would be "aaj bohot kaam kar liya, ab mujhe kuchh nahi karna hai.
"I have worked a lot today, now i do not want to do anything."
Hope that helps. Cheers!
another improvement would be to accept different keyboards that propose automatic writings. I study hindi from english but work with french keys that propose accents and different spelling for the same meaning. Impossible to fight the clock when i have to correct these détails. And that final word is the best example. "Détails" was suggested instead of "details".