Final answer:
The tax bill originates in the House of Representatives, according to Article I, Section 7 of the Constitution. However, the Senate can propose or concur with amendments to the bill.
Step-by-step explanation:
The tax bill originates in the House of Representatives in the legislative process for enacting a law. According to Article I, Section 7 of the Constitution, all bills for raising revenue, including tax bills, must originate in the House. However, the Senate can propose or concur with amendments to the bill. Ultimately, both the House and the Senate must approve the bill before it can be sent to the president for final approval.