Before you can create package drafts and upload Assets to them, you need to set up a Publisher Account:
If you do not yet have a Unity Account, you need to create one; to do this, go to Create a Unity ID. Alternatively, open the Unity Asset Store, click Sign In and then select Create a Unity Account:
Open the Create New Asset Store Publisher page and provide the required Profile information:
(A) Profile picture where you can upload your logo or brand image
(B) Publisher name where you can specify the account name
(C) Website where you can set your website’s location
(D) Customer Support where you can set the location for support
(E) Business contact where you can set the contact name and email.
(F) Region where you can set your country/region (This selection cannot be changed once made).