Almost nothing about a finance system changes from one country to the next. What changes is the statutory surface around it: how a return is filed, what has to be kept digitally, and when e-invoicing becomes compulsory. One page per jurisdiction states those, cited to the government pages they were read from, with every tracked system's own country row beside them.
Saudi Arabia asks more of a finance system than any of its neighbours, and asks it of the software rather than of the accountant: a business invoice is not legally valid until the authority has cleared it, a consumer invoice must be reported within a day of issue, every document carries a cryptographic stamp and a QR code, and Arabic is a requirement of the invoice rather than a preference in the interface.
Three things separate a UAE finance-system decision from the same decision made anywhere else: an invoice leaves the ledger as PINT-AE XML through an accredited service provider rather than as a PDF, the Federal Tax Authority sits inside the exchange as a fifth corner rather than behind a portal, and the date that binds is the one for appointing that provider, not the one for going live.
Three things separate a UK finance-system decision from the same decision made in the United States: VAT is filed through the software rather than beside it, the same is arriving for income tax, and e-invoicing has a date on it. None of them narrows the field much on its own. Together they decide which questions are worth asking in a demonstration.
The alternative is a translated copy of the whole catalogue per country: the same vendor profiles with the spelling changed, competing with themselves in search and doubling what has to be kept current. Stackmark publishes one profile per system and one statutory reading per jurisdiction, and links them.
The list is short because a reading is only worth publishing once we have read the government pages ourselves. A jurisdiction absent from it is one we have not covered, not one where nothing differs.