The steps to be followed to register for bitsat are as follows:
Visit the official website first which is bitsadmission.com and then click to register.
Enter the basic personal and academic details which are been asked.
Then you will be required to upload scanned photograph and signature in the prescribed format
The next step is to pay the application fee in online mode through credit card/ debit card/ online banking or even in offline mode
For more info you may visit the following link: