It was a public display of the lobbying that businesses are waging primarily behind the scenes to change or shape enforcement of the law, most notably its byzantine new provisions intended to crack down on multinationals sheltering profits abroad for tax purposes.

“The question is whether our system is set up today in a way to do little midcourse corrections as time goes on, or is it not,” said Dana Trier, who left the Treasury Department last month after serving as deputy assistant secretary for tax policy during the drafting of the bill. “The mistakes or unintended consequences for this or that group won’t show up for months.”

The result could be a tax-theme replay of the years after passage of the Affordable Care Act, when Republicans refused to cooperate with so-called technical corrections legislation, and a Democratic administration was forced to push the limits of its authority to address concerns in the enforcement of its signature policy accomplishment.

Among the problematic portions to emerge so far is what has become known as the “grain glitch.” A late change to the legislation altered a deduction for United States production in a way that permitted farmers to deduct 20 percent of their total sales to cooperatives — agricultural organizations owned by groups of farmers that operate for the benefit of their members.

This allows farmers to deeply reduce their tax bills, but it has caused an uproar among independent agriculture businesses that say they can no longer compete with cooperatives, since farmers would choose to sell to cooperatives to take advantage of the more generous tax break.