The worst time to find a mistake in your books is after you've filed. A rejected invoice, a client missing a NIF, totals that don't add up, these are small problems that turn into fines, corrections and stress once the tax office is involved.
Facturaz's AI audit exists to catch them while they're still small. Before a deadline, GestorIA reviews your invoices, expenses and contacts, and tells you, in plain language, exactly what needs fixing and how much money is affected. Then it points you straight at each problem.
It's like having someone double-check your homework before you hand it in, except it takes seconds and it never misses the boring stuff.
What a run looks like
You open the audit, pick the quarter, and Facturaz scans everything. In a moment you get a clear summary at the top:
- How many critical issues (things that will cause a real problem if you file as-is)
- How many warnings (things you should look at)
- How many info items (minor, good-to-know)
- The total amount affected, so you can see the financial weight at a glance
Then GestorIA writes you a short, human summary. Not a wall of codes, an actual explanation: what's wrong, what matters most, and where to start. Something like: you have four critical issues in rejected invoices, two of them with totals that don't match their line items, plus a client with no NIF blocking your filing, start by fixing these two invoices, then the missing NIF.
Underneath, every issue is listed individually, grouped by type, so you can work through them one by one.
The problems it catches
These are exactly the things that get businesses fined or stuck, and exactly the things that are easy to miss by eye.
Invoices rejected by Verifactu
An invoice can be rejected by the system, often because something in it isn't right. A rejected invoice that you think went through is a quiet trap. The audit surfaces every one, so nothing is silently missing from your records.
Totals that don't match the line items
If an invoice's total doesn't equal the sum of its lines, the numbers are wrong somewhere, and wrong numbers flow straight into your tax forms. The audit flags every mismatch and shows you the gap, so you can correct it before it reaches a 303.
Clients without a NIF
You can't file properly for a client whose tax ID is missing. It's a small gap that blocks real work. The audit lists every contact and invoice where the NIF is missing, so you can chase it down now instead of at 11pm on deadline day.
Duplicate NIFs across your contacts
The same tax ID on two or three different contact entries usually means a client got entered twice, which makes your client list, and your totals, messier than they should be. The audit spots the duplicates so you can tidy up.
EU VAT numbers never checked against VIES
If you deal with businesses in other EU countries, their VAT numbers should be valid in the official EU register (VIES). An unchecked or invalid number can cause problems with how the transaction is treated. The audit flags every EU VAT number that's never been validated, so you can confirm them.
Overdue invoices still waiting to be paid
Not a compliance issue, but money you're owed. The audit lists invoices that are past their due date, so getting paid stays on your radar instead of slipping off it.
It flags and proposes. It never files for you.
This is the important part, and it's deliberate.
The AI audit's job is to find problems and propose fixes, with one-click actions to help you sort them out. What it never does is file anything on your behalf or change your tax position without you. You review each issue, you decide, you approve. The tool does the looking; you do the deciding.
That keeps you firmly in control of your own books. The audit makes you faster and safer, it doesn't take the wheel.
Why this matters more than it sounds
Most tax mistakes aren't dramatic. Nobody sets out to file wrong. The errors that cost people are the dull ones, a typo in a total, a client whose NIF was never filled in, an invoice everyone assumed went through but didn't. They hide in plain sight because checking for them by hand is tedious and easy to skip when you're busy.
A machine doesn't get bored. It checks every invoice, every contact, every total, the same way, every time. So the things you'd never catch on a Friday afternoon get caught anyway.
The payoff is confidence. Instead of filing and hoping, you file knowing your books were just reviewed end to end and the problems were dealt with.
When to run it
The natural moment is right before a tax deadline, a quick audit, fix what it finds, then file with a clear head. But it's just as useful as a monthly habit, a five-minute check to keep small issues from piling up into a big one at quarter's end.
Either way, it's the difference between finding a problem on your terms, with time to fix it, and finding it on the tax office's terms, after it's already cost you.
The bottom line
The AI audit turns "I hope my books are right" into "I checked, and here's what I fixed." It scans your invoices, expenses and contacts, explains what's wrong in plain words, shows you the money at stake, and walks you to each fix, while leaving every decision in your hands.
Catch the small stuff before it becomes the expensive stuff.
Run your first audit free. Start with Facturaz →
The AI audit is an automated review tool. It helps you spot and fix issues in your own records, but it is not a professional tax adviser and cannot provide professional tax advice. For advice about your specific situation, speak to a qualified professional.