The taxes and fees change all the time. As an ISP you have no control over what the government fees are going to be. How can you list a price up front when you are at the mercy of the people making up these rules?
In places like Europe telcos are able to do it just fine. What you see is what you pay.
> The rules require broadband providers to display, at the point of sale, labels that show prices, including introductory rates, as well as speeds, data allowances, and other critical broadband service information.
The ISP should be free to boldly call out on the billing statement that those fees are government mandated, if they choose to.
Oh it's not a random doorbell, it's a customer who's lawn I mow. ok. Totally ok then.