To apply in Delhi University, you need to follow these steps:

1. Register on the CSAS portal. The CSAS portal is the centralized admission portal for Delhi University and other central universities in India. To register, you will need to create an account and provide your personal and academic details.
2. Choose your programs and colleges. Once you have registered, you will need to choose your preferred programs and colleges. You can choose up to 10 programs and 30 colleges.
3. Upload your documents. You will need to upload your scanned copies of the following documents:
   • Class 10 and 12 mark sheets
   • Category certificate (if applicable)
   • Sports certificate (if applicable)
   • Passport size photograph
4. Pay the application fee. The application fee is ₹500 for general category candidates and ₹250 for reserved category candidates.
5. Submit your application. Once you have uploaded all the required documents and paid the application fee, you can submit your application.

After you have submitted your application, you will be allocated a Centralised University Entrance Test (CUET) scorecard. The CUET scorecard will be used to rank candidates and allocate them seats in their preferred programs and colleges.