A new statute does not erase the records, assessments, appeals, or return work that relate to earlier periods. The Department’s own transition material is clear that the practical workflow needs a period-aware view.
Use the Department’s period distinction
The official guidance says the 1961 Act continues to govern tax years beginning before 1 April 2026, while the new Act applies from its stated transition point. It also explains that the portal will facilitate compliance under both frameworks during transition.
Keep labels and records separate
The returns help distinguishes AY 2026–27 for FY 2025–26 from Tax Year 2026–27 for FY 2026–27. Store the underlying period, the system label, related payments, and source records explicitly—never infer one from the other.
Avoid evergreen mappings
Section numbers, forms, and thresholds are high-change fields. A dependable research workflow links to the current official guide, records the review date, and asks a professional to confirm a client-specific answer.
Educational guide only. Requirements, forms, eligibility, thresholds, dates, and portal processes change. Confirm the current official source and obtain qualified professional review before acting.
Official sources
Reviewed 12 July 2026. These links are included so the underlying authority can be checked directly.