Maintaining accurate and up-to-date vendor information is essential for smooth business operations, aosleger. I'm here to provide details below.
To update your Tax ID number, navigate to the vendor information section and click on the View/Edit Business ID link. This will allow you to make the necessary changes. Then, you’ll be prompted to verify your identity by entering your security code.
I've added a screenshot below for your reference.

I'm adding this guide to help you prepare and file federal 1099s with the IRS: Create and file 1099s with QuickBooks Online.
We're always available in this forum if you have other concerns when editing vendor information. I am always delighted to lend a hand. Take care and stay safe.