Records that survive being asked for.
Five years is a long time to hope a spreadsheet folder survives a laptop change. Because the tax is a property of the documents rather than a report built over them, the history stays intact and queryable - invoices, credit notes, supplier bills and the journals they generated, each still linked to the others.
If the FTA asks what supported a figure on a return filed three years ago, the answer is a lookup rather than an archaeology project.
It isn’t a VAT module.
There’s no separate tax ledger to reconcile against the real one. VAT is calculated by the same double-entry engine that posts the sale, and sits in the same trial balance you close the month on. The accounting and finance page covers the ledger itself - this page is about what it produces at filing time.
Stock movements and payroll post through the same ledger too, so cost of sale and wage expense are already in the figures you’re filing against. See inventory and HR and payroll.
If you’re evaluating ERP more broadly, start at ERP software in Dubai. If your phase of the e-invoicing mandate is approaching, that’s here.