How do I remove feedback posted about a buyer

There are several ways to do it Grant, but easiest way is to go to the item in your won/sold folder and click on the members feedback number, then click the Delete button. It will depend on what system you are using eg desktop version new site, desktop version new site, app etc. If you can't find it initially, put edit feedback or delete feedback in the Help search box up above and there are lots of pages with instructions if you are having trouble.

In fact I see TM still don't allow you to delete or edit feedback on the new desktop site, so you'll need to use the old desktop site.