tax write off
tax write-off. A deduction of depreciation, loss, or expense. [Cases: Internal Revenue 3310–3442, 3470–3505; Taxation 1031.1–1044. C.J.S. Internal Revenue §§ 33, 58, 140, 150–171, 173–180, 182–184, 186–190, 192–196, 198–205, 212, 215–249, 251–265, 267, 270–283, 286, 409, 489, 671, 673, 799–800; Taxation §§ 1738–1755.]