When accessing your listing dashboard, your Zillow 3d Home can be located through your menu items on the left!
To access the 3d Tour page, click on "3D Tour" in the menu on the left
From this page you can
1. Add your own Zillow 3D Home Tour link by clicking "Add Tour"
2. Copy the link from your existing Zillow 3d Home Tour by hovering over the preview and clicking "copy"
In your MLS, you can now paste this link wherever you can manage URL links or add a virtual tour.