Go to this page
https://my.zarmoney.com//UI/Preferences/Default.aspx#activeItem=subscription
or
You can do this by
- Clicking your Company Preferences (Gear Icon)
- Scrolling down the left-hand sidebar and choosing 'Billing'
- Selecting 'Subscription' from the drop-down
- Selecting the plan you would like to enroll in
- Entering a 'Payment Method' at the bottom of the screen
To change your default card, select add a new credit card under 'Payment Methods' and enter your information:
You can delete your old card by clicking the trash icon at the bottom left corner: