Cancel Wave

Open Business settings, scroll to Other, choose Manage Subscriptions, then Manage subscription and Cancel Subscription. Pro or Receipts features run to the end of the current period. Before that date you can pick Remove scheduled cancellation to undo it.

Wave has no page we can link to. The steps below are from their official help page.

Open Wave’s help page

Signed up through Apple or Google Play?

Then Wave cannot cancel it for you. Use the store you paid through instead.

Apple
Google Play

What to expect

A couple of offer screens

Steps

Sign in and click your business name, or open Settings on mobile
Choose Business settings
Scroll to Other and select Manage Subscriptions
Select Manage subscription under the plan you are paying for
Pick the plan in the pop-up and click Cancel Subscription
If you subscribed in the Wave mobile app, cancel through Apple or Google Play instead
Payroll is a separate subscription and cancels through its own article