You may wonder why it’s taking so long for Congress to pass a new tax law. Right now, there are two versions of a bill, one in the House and one in the Senate. Both chambers need to agree on a single bill. The compromise version will then be voted on by the House and Senate. If passed, the bill will be sent to the President to sign. Overshadowing a resolution of the conflicting tax provisions is the need to stay within the Senate’s reconciliation rules, which bar adding to the deficit after a 10-year period, in order to pass the measure there by a simple majority.