Basically what I am trying to do here is just to make a simple TextLabel say "NightWatch Tactical Agent " and there name but it WONT WORK.
local AgentTag = script.Parent["Agent name"] game.Players.PlayerAdded:connect(function(plr) AgentTag.Text = "NightWatch Tactical Agent "..plr.name end)
On line 4 you forgot to put parentheses around what the text should be. So instead of being "AgentTag.Text = "NightWatch Tactical Agent "..plr.name", it should be "AgentTag.Text = ("NightWatch Tactical Agent "..plr.Name)"