The 18 organizations urge the Internal Revenue Service (IRS) to prioritize rebuilding its auditing and enforcement capabilities in order to tackle systemic tax abuses, including in particular those by the private equity industry. The private equity industry has generated greater untaxed revenues over the past decades by structuring their funds to avoid taxes and through a strategy of misclassifying certain earnings, exploiting tax loopholes like carried interest, and utilizing complex and opaque business structures to shield earnings from IRS scrutiny. We applaud President Biden’s plans to fund the IRS and tax enforcement more robustly and believe that these needed changes are a strong argument for such additional resources.