Indicates whether the selected tax can be rounded to the nearest dollar amount (read-only).
value = object.isRoundingOptional()
|object||A Tax object|
|value||A boolean result|
If the selected tax may be rounded to the nearest dollar amount, the value returned by RoundingOptional will be True. Otherwise, the value returned is False. If the RoundWhenOptional property is set to True, this tax will be rounded to the nearest dollar during computation.