The release of two pages of President Trump’s 2005 tax returns provides a new glimpse into his finances, but leaves major questions unanswered about the sources of his wealth, his global debts and the complicated structure of his businesses.

Mr. Trump’s refusal as a candidate to release full returns for multiple years, as has every presidential candidate since Richard Nixon, clouded the picture that voters normally see when deciding who they will cast a ballot for in presidential elections.

As president, Mr. Trump has continued to insist that he will not release information about his taxes because many years of his returns are under a routine federal audit by the Internal Revenue Service.

On Tuesday, the White House confirmed basic information from the 2005 returns ahead of the release of the documents by MSNBC’s Rachel Maddow and David Cay Johnston, a former New York Times reporter, who said he received them in the mail.

They revealed that Mr. Trump paid $38 million in federal income taxes on reported income of $150 million, an effective tax rate of 25 percent.

In October, The New York Times obtained three pages of Mr. Trump’s 1995 tax returns, for filings in New York, New Jersey and Connecticut, which was the first time any of his actual tax returns have been publicly revealed. They showed more than $900 million in losses that could have allowed him to avoid paying any federal income taxes for up to 18 years.

Still, much about his current finances remains murky because documents that have emerged have not included supporting schedules, or any pages from his federal returns, and are from more than two decades ago.

