House Democrats may have more to learn from seeing President Donald Trump’s New York tax returns, despite some fears that seeking the state returns would hurt an ongoing federal lawsuit.

House Ways and Means Committee Chairman Richard Neal (D-Mass.) hasn’t yet called for Trump’s state tax returns following the passage of a New York law, although House counsel is reviewing the option. Democrats say seeing his federal returns could help them review IRS presidential audit practices.

Seeing the state returns could give insight into potential conflicts of interest, crimes, and federal audit outcomes, legal experts said.

“I think that you...