To add a subject to your application:

1. Common App: Go to the "Education" section → "Current or Most Recent Year Courses" to list new subjects.

2. University-Specific Applications: Follow the institution's guidelines for course additions.

3. Transcripts & Additional Info: Ensure the course appears on official transcripts or mention it in the "Additional Information" section.

4. Seek Help: Consult your guidance counselor or the admissions office for clarification.

The process for adding a subject to your application depends on the specific exam or institution. Generally, you can log in to the official portal, check for an "Edit Application" or "Modify Form" option, and update your subjects before the deadline. If changes aren't allowed online, contact the exam authorities.