In the album, track, or merch editor, under the pricing section, you’ll see “Payments will go to”, followed by an email address. If more than one payment address isn't available, the artist will need to first list their unique PayPal address on their Profile page. Artists on multiple labels will see all of their labels listed here.
Items set to pay a label will appear on both the label and artist accounts, while artist-paid items will only be visible on the artist page. Only the current payment recipient can edit payment details.