You may need to change your user's next invoice date associated with a subscription for a variety of reasons. To make those changes, you will need to access the detailed view of a user's account.
How to Edit an Invoice Date
Go to People
Search for the end-user you want to edit the next invoice date for.
Click on their name or click on the 3 dot menu and click Edit.
Next, click on Manage Membership and select Edit Next Invoice Date.
Next, you'll be able to adjust the invoice date and time.
Click Save after adjusting the next invoice date.
NOTE: The script that generates invoices is run twice per day—once at 9 am EST and once at 4 pm EST. If you are adjusting the next payment date/time to generate an invoice, please be aware of these times as it may take several hours for the invoice to generate depending on the time selected for the next payment date.