Purchased Xanathar's Guide to Everything (digital) but not sure its connected to my account.

I see Xanathar's Guide to Everything in my 'current product licenses' but not sure its connected to where I get more options on my character sheet?

What have you tried so far? This is a really bare-bones post.

Before continuing:
-Check Account > Licenses and make sure your entitlements are in sync (a box at the top of the page will tell you whether they are or not)
-On your character sheet, make sure 5e Expanded Rules is selected in the character options as available
-Note that the following subclasses will NOT be available with the 5.5e class bases and will require the 5.5e version to be used (or use the 5e class base and it will work)

Barbarian: Path of the Zealot
Bard: College of Glamour
Ranger: Gloom Stalker
Warlock: The Celestial