A question about lying in sales

The questioner : ... This officer comes and asks, saying, "How much did you sell the car for?" I say, for example, three thousand dinars. As the price goes up, I estimate the value of the concession to the state based on the high price... This is so; I estimate it higher. The more I increase it, I say this. Do you understand what I mean? So here, some of the brothers sold a car to a brother of ours... When I sold it to him, I went with him to... He says to me, "My brother, they are asking how much you sold the car for, in order to assess it for you..." So I say, "My brother, is it permissible to lie to them and say it was such-and-such, meaning a lower amount? Is that permissible?"

The Shaykh: No.

The questioner : It is not permissible.