Hello Gopisetty,

There is no official notification from NTA regarding Bonus answers for wrong questions but few coaching institutes claimed that total 13 questions were wrong in JEE Main Jan 2019 exam which was conducted in 8 session between 9-12th Jan 2019. 2 Questions were wrong in 11th Jan Morning Session Paper in physics subject. Please refer below article to check all the wrong questions:

https://www.entrance360.com/engineering/wrong-questions-in-jee-main-january-2019/

Previously JEE Main was conducted by CBSE, They give  bonus marks for the wrong Answers & Questions. Please wait for NTA official notification,

Good Luck!