How do I cancel subscription to fax app

Managing auto-renewing subscriptions -

http://support.apple.com/kb/HT4098

M1 Mac mini, macOS 12; Watch, series 5 GPS/cellular, watchOS 8; iPad Pro 2nd Gen, iPadOS 15; iPad Air 2, iPadOS 15; iPhone 12 Pro, iOS 15; TV 4th Gen, tvOS 15; HomePods, audioOS 15 and Airport Express w/ Airplay 2

How do I cancel subscription to fax app