I've completed the setup for a vendor to be paid by international payment (Online Billpay), but now need to change the currency from CNY to USD. How do I do that?

I'm here to help you with changing the currency for your vendor in QuickBooks Online, rrspy.

Once you've set up a vendor with CNY currency, you're unable to change it to be a USD vendor. You may consider making that vendor inactive, and then re-add them to assign a USD currency as a workaround.

To make a vendor inactive:

1. Select Expenses, then Vendors.
2. Select Make inactive in the drop-down menu beside the vendor you want to make inactive.

To add a foreign vendor:

1. Select Expenses, then Vendors.
2. Select New Vendor.
3. Enter the vendor's name and other information.
4. From the I pay this vendor with ▼ drop-down menu, select the appropriate currency. 
5. Select Save.
   

Here are articles you can check about multicurrency and using Online bill pay for international payments for your reference:

• About Multicurrency
• How Multicurrency works
• Use Online Bill Pay: International Payments

Please tag me directly if you have any other concerns.