Final answer:
Bills regarding government finances can only be introduced in the House of Representatives, as mandated by the U.S. Constitution, although the Senate can propose amendments.
Step-by-step explanation:
Bills regarding government finances, specifically those that raise revenue such as tax bills, can ONLY be introduced in the House of Representatives. This requirement is established by Article I, Section 7 of the U.S. Constitution. While the Senate may propose or concur with amendments to these bills, it does not have the authority to introduce them. Once both houses of Congress approve a bill, it is sent to the President. If the President vetoes the bill, Congress can override the veto with a two-thirds majority in both chambers.