Malaysian Inland Revenue Board (“MIRB”) recently released the updated version of E-invoicing General and Specific Guidelines, version 4.0. With mandatory enforcement beginning in August 2024 for businesses that record a turnover of RM100 million per annum and July 2025 for all businesses, many businesses may find it challenging to maintain “business as usual” while transitioning to full e-invoicing implementation. To ease this transition, the Government has granted businesses a 6-month interim relaxation period from the date of mandatory implementation. During this 6-month interim relaxation period, the Government will permit taxpayers to use consolidated e-invoices for all activities and transactions and consolidated self- billed e-invoices for all self-billed circumstances. Following to the announcement of the 6-month interim relaxation period and the proposed relevant tax incentives such as accelerated capital allowance claim during Budget 2025, it would seem that the final phase of e-invoicing implementation shall be concluded on 31 December 2025. As such, it is essential to businesses to understand the compliance obligation and data requirements, assess the potential investment costs, and mitigate the risk of non-compliance. E-Invoicing implementation is just the beginning. Businesses should start planning a robust internal defense to ensure ongoing tax compliance and readiness for audits.