What to do 90 days before your Fawtara date

Ninety days is enough, if they are spent in the right order. The order matters more than the effort, because the dependencies run one way: you cannot test until you are connected, you cannot connect until you have chosen, and nothing works until the data is right.

Days 90 to 60 — the data

Start here even though it is the least interesting part, because it is the only part with no shortcut.

1. Audit customer master data for tax identifiers. Every VAT-registered customer needs a complete, current one in its own field.
2. Rationalise units of measure and item codes.
3. Check that tax treatment is held at line level, not applied per invoice.
4. Confirm credit notes reference their original invoices.
5. Fix your own registration details — TIN, VAT number, commercial registration — against what the Oman Tax Authority holds.

While that runs, confirm you can actually log in to the Fawtara Portal with your existing Tax Authority credentials, and that your TIN is associated with a commercial registration number. Finding out otherwise in week ten is the avoidable disaster.

Days 60 to 45 — choose a provider

Shortlist two or three Accredited Service Providers from the Oman Tax Authority's published list. Work through the questions to ask before you sign, and give each of them ten real invoices to validate as they stand.

Remember that you connect to one provider at a time, so this is a decision rather than a trial.

Days 45 to 30 — connect

Record your engagement stages on the portal, upload what is required, set an effective date that lands where you want it — a month end is usually right — and send the connection request. The provider accepts, and is then expected to add you to the SMP within three business days.

The full sequence is in connecting to an ASP.

Days 30 to 10 — integrate and test

• Connect your accounting system to the provider and push a representative sample: standard, zero-rated and exempt lines, a foreign currency invoice, a credit note, a high-line-count invoice.
• Work through the validation failures. Expect them; they are the point of this fortnight.
• Agree how failures will reach your team once you are live, and who owns fixing them.
• Run a full month end in parallel if your date allows it.

Days 10 to 0 — people

1. Train whoever raises invoices. The new rule they have to absorb is that an incomplete customer record now stops an invoice.
2. Tell your customers what will change, and that they will still get a readable copy.
3. Agree your first-week routine: who checks what, daily, and what the escalation is.

The first live week is not a technical event. It is the week your invoicing process finds out which of its assumptions were conventions.

If you have fewer than 90 days

Compress the middle, not the beginning. Choosing a provider quickly costs you less than starting data cleaning late, because data cleaning is the only item on this list that cannot be bought.

If you want the plan applied to your own position, our team runs a readiness review.