If you accidentally selected 'Yes' for the dual or 5-year integrated graduation program on your CAT form, you don’t necessarily need to fill out the entire form again. Here’s what you should do:

1. **Review the Form**: Check if there is an option to edit or update your application. Some application portals allow you to modify your responses before the final submission.

2. **Contact the Helpdesk**: Reach out to the CAT exam helpdesk or support team immediately. Explain the situation and ask for guidance on how to correct the mistake. They might be able to adjust your form or provide you with instructions on how to proceed.

3. **Submit a Correction Request**: If the helpdesk advises you to submit a correction request, follow their instructions carefully. Ensure you provide all necessary details to facilitate the correction.

4. **Recheck Your Application**: After making corrections, verify all other details in your application to ensure everything is accurate.

5. **Keep Documentation**: Save all correspondence and screenshots of any changes or communications for your records.

Handling the issue promptly and following the official guidance will help resolve the mistake without the need to resubmit your entire form.