revenue - n. money that is collected for public use by a government through taxes

trigger - v. to cause (something) to start or happen

exempt - not required to do something that others are required to do

deduction - n. something (such as an amount of money) that is or can be subtracted from a total

loophole - n. an error in the way a law, rule, or contract is written that makes it possible for some people to legally avoid obeying it

bracket - n. a category that includes a certain range of incomes, ages, etc.