Does anyone know the amounts (in U.S. dollars if possible) charged by governments for the following aiports: Paris, Amsterdam, Brussels?

Exit fees? I've never heard of exit fees. ANy fees would be incorporated into your airfare price. Or maybe I don't understand.

While it is common in the Caribbean and Mexico to charge departure fees, it is not done in Europe.

Never seen a separate exit fee payable at the airport in Western Europe (Latin America, different story). But check Fodors on-lines guides' general info for each of the countries you're interested in. The guides will tell you for sure if a separate payment is needed.

If one is to assume that "tax" means something that is imposed by the local governing agency, there is a departure fee, as illustrated by this ticket reservation. However, I am not sure that a "service tax" is a true tax. Note that the taxes exceed the cost of the flight itself.

AIR - - SKY1
25 EUR
25 EUR

TAX - Fuel Charge
5 EUR
5 EUR

TAX - Passenger Ch
9.09 EUR
9.09 EUR

TAX - Insurance
2 EUR
2 EUR

TAX - Service Fee
5 EUR
5 EUR

TAX - Departure
8.2 EUR
8.2 EUR

TAX - Aviation Tax
4.48 EUR
4.48 EUR