Configure three VLANs and QOS

I am trying to configure three different VLANs and QoS for those (Management - VLAN 1, Staff - VLAN 10, Guest - VLAN 20 ). When I change the untagged land to management first one it doesn’t allow me to set the VLAN. It is supposed to be VLAN 1 so it may just default to that. I an also need to set up group QoS for this. Any advice would be helpful.