The bill may lead to further insight into the vast and complex network of Mr. Trump’s business activities, which he has vigorously tried to conceal for decades.

After Times reporters obtained printouts from Mr. Trump’s I.R.S. tax transcripts for the years 1985 through 1994, they reported that he had lost $1 billion in just 10 years. The printouts were sent by a person who had legal access to them.

Mr. Trump and some of his supporters say the interest in his taxes is a political witch hunt meant to derail his White House agenda.

[Here are the latest developments on the fights over President Trump’s taxes, access to the full Mueller report and more.]

How did the hunt for Mr. Trump’s tax returns end up in Albany?

The hunt is in New York because Mr. Trump, who was born in Queens, lived here for years.