If you still have the switch, would you please give this method a try to disable vlan1. Thanks, https://forum.pfsense.org/index.php?topic=123324.new;topicseen#new

see the URL below to disable vlan1. Instruction is one page 5. https://forum.pfsense.org/index.php?topic=123324.60

tp-link, please fix the issue with vlan1 on the next release.

I also requested the source code form them so that I can make the changes. Got rejected! This is a really bad business decision for not letting users to: a. remove vlan1 b. allow tag support on vlan1...