If you are still waiting for the outcome of your application, you do not need to make changes to your project yet. Once your project has been approved, inform your grant officer of any changes before accepting the Letter of Award.
If your application has been approved and you have accepted the Letter of Award, contact your grant officer via email and inform them about the changes that you would like to make. Your grant officer will assess whether you need to update your project details on the portal, and give you access to make changes if necessary.