This charges a real card through Square, then creates a real Mindbody sale — there is no test mode. Mindbody computes the final total, tax included, right before the card is charged. Not every location has Square set up yet; changing Location above may show an error instead of a card form.
Test a Square charge
Square's ACH flow -- clicking below opens Plaid to link and verify a real US bank account, then returns to this page to finish the charge and create a real Mindbody sale. No test mode.