Fatoora implementation in the Kingdom of Saudi Arabia is under implementation in phases and waves.
Source: https://zatca.gov.sa/en/E-Invoicing/Introduction/Pages/Roll-out-phases.aspx
In the initial stage, referred to as Phase 1 or the Generation phase, taxpayers will be obligated to utilize electronic solutions that adhere to Phase 1 specifications for the creation and retention of tax invoices and notes. This requirement came into effect on December 4th, 2021, encompassing all taxpayers with the exception of non-resident taxpayers, as well as any entities issuing tax invoices on behalf of VAT-liable suppliers.
Phase 2, termed the Integration phase and implemented gradually across specific taxpayer groups, will entail the introduction of technical and business prerequisites aligned with Phase 2 for electronic invoices and electronic solutions. Additionally, it will involve integrating these electronic solutions with ZATCA’s systems. ZATCA will inform taxpayers about their designated Phase 2 timeline at least six months before implementation. This rollout occurs in stages, categorized by taxpayer groups, as depicted in the table above.