How do I link my Alliant account to Apple Cash? On the Apple Cash website: Log in to your Apple ID account. Go to “Wallet & Apple Pay”. Select “Apple Cash” and follow the prompts to link your Alliant account. On the Apple Cash app: Open the Settings app on your iPhone. Tap the "Wallet & Apple Pay”. Tap “Apple Cash”, then “Bank Account. Tap “Add a Bank Account” and follow the prompts to link your Alliant account. For more information visit the Apple Cash website.