Yes, you can make changes to your GST refund application after you have submitted it. If you realize that you made a mistake or need to update any information, you have the option to amend your application. To do this, you will need to access the GST portal and follow the prescribed procedure for amending a refund application.
It's important to correct any errors or update the necessary details as soon as possible to avoid any delays in processing your refund. Remember to double-check all the information before submitting the amended application to ensure accuracy.