Let me give you the details on what you can do for your contractor's W-9, @angieglover.
Currently, QuickBooks Online (QBO) does not allow you to edit the W-9 form in the documents tab. If you need to make any changes to your W-9, be sure to do so before your employer or client files your 1099 with the IRS.
I recommend that you advise your contractor to update their info at any time in their account, and QuickBooks will automatically update it in your account.
For a detailed explanation, please see this article: Invite a contractor to add their tax info.
Moreover, here’s a helpful guide to help you prepare them smoothly when tax season arrives: Create and file 1099s using QuickBooks Online.
Feel free to contact the Community if you have any questions about W-9 forms. We're here to help. Stay safe and enjoy the rest of your day!