Changes the price of

• Changes the price of, as at the supermarket
• Labels anew
• Puts a new price on
• Marks down, perhaps
• Changes the price on
• Corrects, as an ID on Facebook
• Changes a name on, as a Facebook photo
• Puts new prices on

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: retag )