How to use FindGameObjectWithTag to get 0

I've been trying to use a simple script to count the number of GameObjects to print to a GUI. I can't figure out how to properly do it. My difficulty is that Length always returns 1. How should I change this code? public static int count = 0; private GameObject[] getCount; void Update () { getCount = GameObject.FindGameObjectsWithTag("BallsTag"); count = getCount.Length; }