Hi troy1,
I'm happy to take your additional questions about charges after migration and about linking your customers' QB Payment (Merchant) service.
There’s no possibility that your customers will be charged twice because they’re now using QBO, so that’s the only subscription they have to pay for. Regarding QB Merchant, there is no subscription fee for it. They will only be charged when they process a payment or when their customers pay their invoices online.
QuickBooks Merchant is not included in the migration and won't work in QB Desktop after May 31. If your customers want to use the service, they have to connect their existing Merchant account to QuickBooks Online. Also, it will not be inactivated if they won't use it.
Assuming your customers connect their QB Payments to QBO, all future transactions will be synced just like how everything works in QuickBooks Desktop. And yes, the information is posted down to the customer level. More details can be found in this article: Connect your QuickBooks Payments account to QuickBooks Online.
Please feel free to comment again if you still have questions about QBO and QB Payments. I'm just around to help.
