The ruling on forging some documents to evade taxes

There are some publishing houses that are asked to send books, especially Islamic books, to Muslim distributors who distribute them commercially—naturally—in the lands of disbelief to the Muslim minorities residing in the lands of disbelief. However, when this merchandise, which consists of books, enters, very high taxes are imposed on it if it is known to be for trade. So the distributors ask the publishing house to send another invoice stating a value lower than the original commercial value—the original price—by a certain amount that is below the threshold at which taxes are imposed. Consequently, they avoid paying large taxes on that merchandise. They ask whether it is permissible to send this second invoice, which is not genuine but is merely presented to the customs officials in those lands so that they do not have to pay the exorbitant taxes imposed on them?
Will they deal with the customers according to the reduced price? No.
The price on this second invoice does not exceed two percent of the actual value—Meaning: There is no harm in it; there is no obstacle. The most they do is keep one price private and announce another price to protect themselves from injustice, and there is no harm in that.