This document contains temporary regulations that modify existing regulations related to the penalty under section 6695(g) of the Internal Revenue Code (Code) relating to tax return preparer due diligence. These temporary regulations implement recent law changes that expand the tax return preparer due diligence penalty under section 6695(g) so that it applies to the child tax credit (CTC), additional child tax credit (ACTC), and the American Opportunity Tax Credit (AOTC), in addition to the earned income credit (EIC). The temporary regulations affect tax return preparers. The substance of the temporary regulations is included in the proposed regulations set forth in the notice of proposed rulemaking on this subject in the Proposed Rules section in this issue of the Federal Register.