You will be needing your category certificate if you are not of general category. 

Income certificate is not required  to fill the application form. 

Best of luck. 

Hi Haleema,

The application form will release from 7th March 2018. Before filling the form, keep this documents ready with you-

• A Valid ID Proof number
• Valid Mobile number and Email ID
• Candiate's name and Date of Birth
• Parent's name
• Parent's Educational Background, Occupation, Income
• Candidate's Educational Details
• Digital Photograph and Signature
• Category Certificate(if applicable) of candidate

For more details go through the link https://medicine.careers360.com/articles/jipmer-mbbs-application-form.

All the best!!