Portal:United States Internal Revenue Service, Notice 2021-41 (2021)
“ Construction of a qualified facility begins when physical work of a significant nature begins. . . . Whether a taxpayer has begun construction of a facility before [the statutory deadline] will depend on the relevant facts and circumstances. The Internal Revenue Service will closely scrutinize a facility, and may determine that construction has not begun on a facility before [the statutory deadline] if a taxpayer does not maintain a continuous program of construction as determined under section 4.06. ”
