If you stick to fiber carbs then you are doing it according to the book
As msanjelpie said there are products around that use the'net carb concept' to claim lower carb counts for those products using sugar alcohols in them which can be a slippery slope for some people, but deducting only the fibre is the safe way to do it.
BTW for anyone outside the USA do check where on the nutrition label the fiber/fibre is mentioned.
In UK and Europe fibre is not counted as being a carbohydrate so our labels liste them in a different section of the label and do not include them in the carb count, so we do not deduct them.
In UK 'total carbs' on a label = 'net carbs' according to Atkins.