Well you can't exactly "turn it off", you can however have it stop adding. I'm not sure how your move works, or what it's supposed to do but you can change the trigger to "time = 0". Maybe that'll help?

I suggest using Varset rather than Varadd for that.

type = varset
trigger1 = !time
var(30) = 5

type = varadd
trigger1 = var(27) < 50
var(27) = 1

[Statedef 1100]
type = S
ctrl = 0
velset = 0,0
anim = 1100
movetype = I
physics = S
sprpriority = 2

[State 0, Helper]
type = Helper
trigger1 = AnimElem = 3
helpertype = normal ;player
name = "Sharingan"
ID = 556
stateno = 556
pos = 4,-58
postype = p1    ;p2,front,back,left,right
facing = 1
keyctrl = 0
ownpal = 0
supermove
pausemove
size.xscale = 0.4
size.yscale = 0.4

[State 0, PlaySnd]
type = PlaySnd
trigger1 = AnimElem = 1
value = S4,7
volume = 0
channel = -1

[State 0, PlaySnd]
type = PlaySnd
trigger1 = AnimElem = 3
value = S4,6
volume = 0
channel = -1

[State 1, VarAdd]
type = VarAdd
trigger1 = !var(1)
v = 1    ;fv = 10
value = 1

[State 1100, 1]
type = ChangeState
trigger1 = AnimTime = 0
value = 0
ctrl = 1
so when ever i do this move it goes to var(1) = 1
but i can get var(1) = 0 when i press the same button again
Sorry for bothering all you because im just that dump :\

I think this is what you are trying to do...
[State 0, VarSet]
type = VarSet ;Use a varadd when you want to add or subtract to an existing var otherwise you should use a varset.
trigger1 = !time ;or whatever animelem you want the var to start
var(1)=Ifelse(var(1)=1,0,1) ; basically if var(1)/ sharingan mode is already active it will deactivate, if it is not active it will activate. 
ignorehitpause=1