From Dashboard → Distribution, create a named rule with one or more recipients — each recipient is either a specific employee or the business/house account — and a percentage for each. The percentages across a rule must add up to 100%.
One rule can be marked as the store's default, used by any QR code that doesn't specify its own override. A rule that's currently the default, in use by a QR code, or already referenced by past tips can't be deleted.
Changing a distribution rule only affects future tips — it never retroactively changes how an already-completed tip was split.