You may have subscriptions that have various units. If a customer wishes to remove one of these units, this can be done easily.
1. Navigate to the relevant subscription ID. (View in active subscriptions or search customer name or ID). Select Edit Unit Types, Remove the applicable unit, and select when you'd like to remove it from, i.e. Immediately or on the Next renewal date. Click preview changes to review and then Change units to confirm.
2. Remove the applicable unit, and select when you'd like to remove it from, i.e. Immediately or on the Next renewal date. Click preview changes to review and then Change units to confirm.
Selecting Immediately will create a pro-rata credit based on how long is left in the current subscription period (4 weeks/Month, etc.). This breakdown will be visible in the preview screen. This credit will then apply to the next bill.
Selecting On next renewal will mean the unit is no longer billed from the next bill onwards.
Note: You can also check the customer's upcoming invoice in Stripe to verify your changes. Select 'View on Stripe' when on the customer's page.