The IRS or Internal Revenue System was the system set up in the United States after a cabal of banks was given authority to print fiat currency with no backing of any kind.
This body was created to collect tax money from the interest on this creation of money of these cabalist bankers. These collected funds would go to fund out-of-control spending and priorities of the corrupt government.
This government had decided to forget the compact it had with the citizens of the country through its Constitution. They had taken an oath to uphold this compact for the powers it was given by the people. Yet, it decided to take and steal from the American people and their rights instead of protecting those rights.
So they implemented this entity of theft and coercion to fleece them of their God-given rights and freedoms granted by the Constitution.