Having a mismatch between your caste certificate and the category mentioned in your 12th transfer certificate (TC) could potentially create confusion during the admission process, especially since caste category plays a role in reservation-based seat allocation.

Here’s how to address it:

1. **Correct the Transfer Certificate**: Contact your school and request a correction in your transfer certificate. Explain the issue and submit your valid SC caste certificate as proof. Schools usually have procedures for such corrections, and this can help avoid complications later.

2. **Submit Caste Certificate During Counselling**: For NEET admission, what primarily matters during counselling is the **valid SC/ST caste certificate** issued by the appropriate authority. Since the TC is not required during the counselling process, focus on ensuring your caste certificate is accurate and updated.

3. **During Admission**: While transfer certificates are checked during the final admission, most institutions consider the valid caste certificate issued by the government for category verification. However, having consistency between your documents (TC and caste certificate) is ideal to avoid unnecessary delays or complications.

4. **Seek Clarification**: If time is tight, clarify the situation with the admission authority of the medical college where you are applying. They may guide you on whether the mismatch will be a significant issue.

Act early to resolve the inconsistency to ensure a smooth admission process.