Firstly, Welcome to the Forum!!
Your toes should point the way that they naturally point when you're just standing. Most people's feet don't naturally point straight ahead when you're standing relaxed. That natural toe-ing out shouldn't affect your score, or, more importantly, your riding. ;)
That being said, gripping too much or incorrectly in the saddle can cause your toes to stick out too much. When that happens, you're using the back of your leg rather than the inside against the horse, and your toes will stick almost straight out to the side. You can tell whether you have this problem by looking at your riding boots, pants, or half-chaps to see where grime accumulates. If it's down the inside of the leg, great! If it's down the back of your leg, you know what to focus on. A correctly positioned leg is not only going to get you a better score, no matter what discipline, but will make you a more effective rider overall.
If you do have excessively turned-out toes, remind yourself to keep your joints relaxed, especially your hips, knees, and ankles. Don't force your heels down, but let your weight carry them down. You want to feel like your heels are the heaviest part of your body. If the rest of your leg is positioned correctly, your toes will fall into a natural angle for your conformation.