One year of inactivity is too little. You can still be DF'ed, if a JC offense exists and is proved, just like any active jw.
The only exception that I remember from the elders handbook is this: if one is inactive for MANY years (i.e. more than 10) and if he lives in ANOTHER area, different from the one he used to be active, and NO-ONE in that new area identifies/knows him as a JW, only then a JC wouldn't need to be formed, because that person would be the same as a worldly person anymore.
But, one year of inactivity? In the same area? In an area where you are known by the neighbours as a witness (regardless of standing)? JC forming is almost certain, provided of course that you commited a DF offense.