Welcome back! If you've not already, make sure you pop by Personal > Dashboard on the top nav bar. Depending on how long you've been gone, you should have some loyalty boxes waiting for you c:

Useful Links:

What to do on Subeta? FAQ Useful general information for newbies Customise your dashboard Useful Custom CSS Builder Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)

The achievement will have deposited the Loyalty Boxes directly into your inventory. :)