federal donation 

Nickname for federal taxation. Rather than "owing" taxes to the federal government, one donates money to the federal government so that they can use it at their own whim.

1)

I: I still have not filed the tax I owe to the government
Q: You don't owe the government! Those are mandatory federal donations.

2) On April 15th, I calculate the federal donations that I gave to the government

federal donation by Kender-Dragonfly April 13, 2017