The 2023 Early Childhood Transition Questions and Answers document (2023 EC Transition Q and A) under the Individuals with Disabilities Education Act (IDEA) incorporates longstanding policy and provides further clarification on early childhood transition requirements as children transition from the IDEA Part C early intervention program to the IDEA Part B preschool program, in response to questions received by the Office of Special Education and Rehabilitative Services (OSERS), Office of Special Education Programs (OSEP) in the U.S. Department of Education (Department). This document updates OSEP’s Early Childhood Transition Frequently Asked Questions (December 1, 2009, FAQs) based on the 2011 IDEA Part C regulations and supplements the 2009 FAQs (which addressed transition data reporting questions under the State performance plan and annual performance report (SPP/APR)). This Q and A document also incorporates guidance from OSEP’s 2011 Letter to Infants and Toddler Coordinators Association (ITCA) and National Association of State Directors of Special Education (NASDSE), as well as OSEP’s Letter to Nix (March 17, 2023). The purpose of this guidance is to assist State educational agencies (SEAs), and local educational agencies (LEAs) in ensuring a seamless transition for children with disabilities who received early intervention services under IDEA Part C to eligibility for and receipt of preschool services under IDEA Part B. (author abstract)