A payment to a vendor was made by credit card for additional materials. How do I tie the payment to the vendors account as a paid bill?

You'll have to create a bill under the vendor's name, then record the credit card payment using the Pay Bills option, @debbie-premiermg. This way, you'll be able to tie the payment to the vendor's account and keep track of your expenses.

Linking a credit card payment to a vendor is made easy in QuickBooks Online (QBO). All you have to do is to create a bill if you haven't already. Here's how:

1. Go to the + New button.
2. Under Vendors select Bill.
3. Choose the vendor's name in the Vendor drop-down.
4. Input all the necessary details.
5. Select Save and close.

I've attached screenshots below for your reference.

After creating a bill, you'll have to record the credit card payment  using the Pay Bills option. Here's how:

1. Go to the + New button.
2. Under Vendors select Pay Bills.
3. In the Payment account, select your credit card account.
4. Enter the payment date.
5. Select the bill you want to pay.
6. Click Save or Save and close.

I've attached screenshots below for your reference.

Once done, you can pull up the Transaction List by Vendor report. This is to check all your transactions for a specific vendor and make sure that what you've entered is correct. Just go to the Expenses and vendors section in the Report menu's Standard tab.

Please let me know if you have other concerns. I'm just around to help. Take care always.