He is usually assumed to have been born at Akhetaten (Amarna), his father's court city, but this follows from an inference about his contested parentage rather than from a direct record; no inscription or administrative document names his birthplace.
What would resolve this Resolution of his parentage (whether his father was Akhenaten or Smenkhkare) together with an inscription or administrative record placing his birth directly; neither currently exists.
OpenEgyptology; Amarna period studies; ancient DNA and mummy studiesDivinity Atlas Open Questions Register, First Edition