'Tax collecting' in the Bible

For if you love [only] those who love you, what reward will you get for that? Do not even the publicans [Note: These were people with a bad reputation for their dishonest tax collecting activities] do that much?

Then after these things happened, Jesus went out [i.e., probably walking along a street] and saw a publican [Note: This was a person with a bad reputation for dishonest tax collecting activities] named Matthew [i.e., the same as Levi. See Mark 2:14] sitting at the toll booth [collecting taxes] and said, "Become my follower."