In order to edit an existing pricing for a course, you can:

1. Click on "Sales" in the side navigation bar.

2. Select "Pricing"

3. Click on the pricing you intend to edit.

4. Once done, here, you can edit the "Country".

5. Edit "Delivery Mode"

6. Change the "Price"

7. Save once done.

This can also be done in the Course Creation/Manage Course flow, i.e. under the "settings" page of the course if there are pricing added to the course.