I just set up my Desktop Pro 2020 with payment options for online payments. The payment options button will not appear on the invoices

Congrats on setting up your QuickBooks for online payments, @AN13232017.

I'll make sure you'll be able to accept online payment in your QuickBooks Desktop (QBDT).

To begin with, I recommend updating your QBDT to the latest release to ensure it's equipped with the newest features and fixes.

Here's how:

1. Go to the Help menu and select Update QuickBooks Desktop.
2. Select the Update Now tab. 
3. Click Get Updates to start the download.
4. When the download finishes, restart QuickBooks, and accept the option to install the new release.

You can also check this article for more details: Update QuickBooks Desktop to the latest release.

If this is not the case, I suggest contacting our Merchant support team. There, one of our live agents can look into the reason why you're unable to turn on your online payments in QBDT.

Once everything is all set, feel free to utilize these resources that can help you manage online payments in QBDT:  

• Receive and process payments in QuickBooks Desktop
• Process checks in QuickBooks Desktop

I'll be around to back you up whenever you need help with your online payments and invoice. Keep safe and more power to your business!