sir,mene jee mains january exam diya hua h or april k liye bhi apply kiya hua h. kya me ipu k application form m january k roll no. dal skti hu but mujhe april k bhi dena h abhi or uska admit card ni h to score kya january wale exam k lgenge?

Hello student I request you to please fill the application number of Jee main April examination while filing the IPU form because the result of Jee main April examination is best of the  two(January and April examination) so you won't face any problem in future. But if you only submit the application number of jee main January paper then you might face problem of availing the result of Jee main January examination only.
Application for jee main April examination starts from 07th of February and shall remain open till 07th of March 2020.
Feel free to comment if you have any doubt
Good luck