Where a taxpayer challenges a tax assessment on the basis that it is invalid, unlawful, or that no valid assessment exists, the taxpayer's recourse lies with the High Court for a declaration of law by way of declaratur, rather than through the statutory remedies of objection (s62) and appeal (s65) under the Income Tax Act. The statutory remedies of objection and appeal presuppose the existence of a valid assessment and are incapable of providing effective redress where the validity or existence of the assessment itself is challenged. A taxpayer who challenges the validity of an assessment is entitled to approach the High Court for declaratory relief in terms of s14 of the High Court Act, and is not required to exhaust the domestic remedies of objection and appeal which are designed for challenges to the correctness of valid assessments. A point of law challenging the validity of an assessment may be raised at any stage of proceedings, including after an objection has been lodged and determined, provided there is no prejudice to the other party.