Hello Yashaswi, don't worry as you have until April 25th to submit your application form.

• Login to your candidate page on the admissions portal of SRMJEE
  
• Click on book exam slot
  
• If you have given your first choice as Patna, then it will be your default test city
  
• Select examination venue
  
• Select exam date and time
  
• Click on confirm to lock in your choices
  
• You can also select change if there are any changes to be made
  
• Click on view hall ticket and take print out
  
• You will receive an e-mail or SMS once you complete these steps
  

Here's the link  http://www.srmuniv.ac.in/content/slot-booking-instructions