Scope
How to backdate charge?
How to backdate a quick charge?
Solution
While adding charges to a subscription or customer record, you can specify dates from the past provided the site setting for backdating Charges is enabled.
On the Subscription/Customer details page, click Add Charge and specify the service period from the past. The invoice date is captured based on the service period cannot exceed 1 month into the past from the present date.

Similarly, while creating a Quick Charge to a subscription or customer record, you can specify dates that do not exceed 1 month into the past from the present date.

Click here to know more.