I see how challenging it is on your end to schedule payment to a particular vendor, Helena. Let me add info about this and direct you to the best help.

I'd like to know if there's an error message when you schedule a payment for that particular vendor, and if you perform the troubleshooting step my colleague @SirielJeaB suggested.

If not, I recommend performing it. If you're done and the issue persists, you can download the PDF version of the bill by opening the transactions and clicking the Print icon. Check out the sample screenshot below:



In the meantime, manually send it to your vendor using your email. Once they pay, go to the
Pay Bills tab to record it manually. Here's how:

1. Click the +New icon.
2. Select Pay Bills from the Vendors column.
3. Tick the box of the bill you want to mark as paid. Then, Save and close.

You can read this article for more information: Enter and manage bills and bill payments in QuickBooks Online.

Another way around is to manually upload the bill payment transaction in QBO via CSV file. Then, match it with the bill transaction to automatically mark it as paid.

If the bank account you'll utilize to pay your vendor is connected to QBO, the transaction will be imported into the Banking Transactions page automatically. All you need to do is find and match it with the bill transaction from the For Review section.

Additionally, I recommend contacting the QuickBooks Online (QBO) Care Team to isolate your issue of scheduling payment for a particular vendor so they can help you find the root cause and provide you with a fix.

If you want to learn how to run the Vendor Balance Detail report to keep track on your vendor transactions, you can check this article: Run reports in QuickBooks Online.

You can always return here if you have additional questions about managing your vendor bills. We'll be willing to assist you. Have a good one.