How do I switch from using Melio with QuickBooks online to the new QBO billpay service? All documents I find say coming soon or don't tell how to start the service.

Welcome to the Community, joe-dumptruckdis.

I'm happy to provide some info about switching from Melio to QuickBooks Online Bill Pay.

As you may know, the integration with Melio Bill Pay is being discontinued and the service will soon be powered solely by QuickBooks. With that, the transition is being rolled out in phases. This will be happening throughout this year and you will be notified when it's time to switch, along with further instruction on how to do so. In the meantime just keep using Melio as normal and keep an eye out for any QuickBooks Online Bill Pay emails. 

The following article provides additional info about switching from Bill Pay powered by Melio to QuickBooks Bill Pay.

Please don't hesitate to reach back out in the comments below if you have any other questions. I'll be here to lend a hand.

@joe-dumptruckdis 

As far as I know, this issue is still ongoing and it seems like they are having trouble fixing it. You can signup for a free Melio account to integrate with QBO as the workaround.

https://affiliates.meliopayments.com/quickbooks

You can also get $100 cashback to pay the first bill.

https://affiliates.meliopayments.com/cashback