First, login to https://sellerportal.deliverr.com if you aren’t already.
Next, visit Returns -> Setting https://sellerportal.deliverr.com/returns/settings
Click on Manage Integrations below the RMT name
Next, click on Disconnect
The RMT has now been disconnect from your Deliverr account.
📌 Important Note: Please remove Deliverr's address on RMT tool to stop returns being sent to Deliverr.