Incomplete statement: expected assignment or a function call error?

local Taps = game.Players.LocalPlayer.leaderstats.Taps.Value + 1
local cd = false
script.Parent.MouseButton1Click:Connect(function()
	if cd == false then
		cd = true
		Taps + 1
	script.Parent.Sound:Play()
	script.Parent.Active = false
	wait(.05)
	script.Parent.Active = true
	cd = false
	end
end)

Firstly, Taps is defined as the current leaderstats.Taps.Value in client + 1. Secondly, you did Taps + 1 instead of Taps += 1 or Taps = Taps + 1. Thirdly, change the value in the server instead of the client. Use remote events and server scripts to make the change visible to the server and to prevent complications.