To edit an existing profile,

1. Go to the Magento 2 Admin panel.
2. On the left navigation bar, click on the Tmall Integration.
   The menu appears as shown below:
   
3. Click on Profile Manager.
   The Profile Manager page appears as shown below:
   
4. Scroll down to the required profile row.
5. In the Action column of the respective row, click the Edit link.
   The profile editing page appears as shown in the following figure:
   
6. In the left navigation panel, click the required menu, and then make the changes as per requirement in the respective section.
7. Click on the Save button.
   The edited profile is saved and the success message appears on the Manage Profile page.