The Internal Revenue Service said on Monday that Black taxpayers have been far more likely to be audited than others and that it is considering changes to its case selection process to address discrimination in how the tax code is enforced.

The acknowledgment came after the publication of research this year showing that Black taxpayers were disproportionately audited, prompting calls from members of Congress for a review into the methodology and algorithms that help determine who is selected. The tax collection agency, which received an $80 billion infusion in funding last year as part of the Inflation Reduction Act, has said it would work to make the system more equitable.

“While there is a need for further research, our initial findings support the conclusion that Black taxpayers may be audited at higher rates than would be expected given their share of the population,” Daniel Werfel, the I.R.S. commissioner, wrote in a letter to Senator Ron Wyden of Oregon, the Democratic chairman of the Senate Finance Committee.

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