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Hi @chekenawells - Are you referring to your link to get credit for referrals? Are you just using online store or one of the plugins?
You might be able to add the clickable link in the body of the "About" page if you're using a plugin.
If you are using Square's online store offering there isn't a way to embed anything to it. You can edit the info and add items but that is about it.
Square Community