Hi there, nrizzetta. To edit your vendors information, you can directly go to their profile and make necessary changes.
Keep in mind that, 1099 categorization and associated transactions are correctly mapped for accurate tax reporting. You can review and adjust the categories by looking at individual transactions linked to this vendor and updating their account categories as needed.
Here's how to edit their information:
- Go to Expenses, then click the Vendor tab.
- locate the vendor you want to edit.
- Click the vendor, then click the Edit button on the top right corner.
- Make changes to the information you needed.

If you haven't prepared a 1099 form for your vendors, you may refer to this article for detailed guidance: Create and file 1099s.
Don't hesitate to reply to this thread, I'll be on the lookout if you still have other concerns related to QBO.