Login to your Seller Central account, go to settings in upper left corner, then add [email protected] as a user on your account. There is a second step that must be done after we accept your invite (detailed below).
https://s3-us-west-2.amazonaws.com/secure.notion-static.com/4b9500e2-40e8-4c25-a1a7-61af46b97b53/untitled
https://s3-us-west-2.amazonaws.com/secure.notion-static.com/d4e334a4-a859-49de-ba09-ff3a919aac95/untitled
Then wait for us to accept as a user. Then you'll have to update our user permissions. Please give us access to at a minimum all sections in the Inventory tab (view & edit), and if we are doing other work for you ensure we have permissions for those as well.
Just beware to not give us access to change user permission as that makes us a "super user" and it's just best if you are the only account with that permission.
https://s3-us-west-2.amazonaws.com/secure.notion-static.com/bd85fd29-95af-4d26-9230-5306f5af3b90/untitled
https://s3-us-west-2.amazonaws.com/secure.notion-static.com/5e30a709-e1f7-4b05-8625-774691934f6e/untitled