I don’t have any sympathy for telecos. But… it is difficult. For example, the city school district in my city, whose boundaries are not congruous with the city boundaries has an excise tax on different classes of wireless service.
These types of rules may have unintended consequences, for example requiring that you collect a street address before providing pricing. It also may encourage telcos like TMobile, who embeds fees in rates to be more AT&T-like “executive retreat recovery surcharge”.