Hi Deb Joy,

For this you should create 2 O2m fields of the partner with domain (customer = True and supplier = True) and also create 2 boolean fields (show_vendor, show_customer) which will be changed from the button click.

Now, add attrs on both the O2m fields. If you click on Vendor button, the show_vendor boolean should be checkd and show_customer should be set to False and based on attrs you vendor O2m field will be visible. Same goes for Customer button.