In Australia & New Zealand, the Total Carbohydrates value in the Nutrition Information Panel excludes Fibre. So you don’t need to deduct the fibre (or anything!) from the Carbohydrate total. This is also known as Net Carbs in the USA.
For example, if a label says:
Carbohydrates 5g of net carbs, of which;
Sugars 2 g
Dietary Fibre 4 g
The total carbs listed on the label is the available carbs which is the 5g and this is the value to include in your daily carb count (if tracking macro's). This figure does not include the fibre of 4 g.