If you missed paying the counseling fee but have paid the registration fee, you should still be able to participate in the second round of counseling by paying the remaining amount. Here's what you should do:

1. Check Official Notifications: Look for any notifications or guidelines from the Bihar NEET state counseling authority regarding payment procedures and deadlines for the second round.

2. Contact the Counseling Authority: Reach out to the counseling authority or helpdesk for assistance. They can provide specific instructions on how to proceed with the payment and ensure your participation in the second round.

3. Verify Your Status: Confirm your current status in the counseling process and any actions required to be eligible for the second round.

4. Complete Payment Promptly: Make the necessary payments as soon as possible to avoid missing out on the opportunity to participate in the second round.

It's important to act quickly to resolve this issue and ensure you don't miss any deadlines.