An AI invoice tax validation agent reads tax lines and supplier tax details from each invoice, and recomputes tax from the taxable amounts using the rates and rules your tax team provides.
Takes tax rates, amounts and registration numbers.
Looks up the tax treatment for the vendor and item type.
Calculates the expected tax from the net amount.
Flags differences in rate, base or label.
A person rules on unclear treatment.
Outcome and reason are stored.
It flags differences between stated and expected tax, missing tax identifiers, unusual rates for the item type and invoices that lack mandatory wording.
It passes clean invoices on and sends doubtful ones to the tax or AP owner with the calculation and the rule it used.
Tax rules vary by country, item and supplier status, and invoice approvers are rarely tax specialists.
The correct rate depends on place, item and status.
Small differences hide real errors.
Tax IDs change or are mistyped.
Reverse charge and exemptions need judgement.
Wrong tax is found in audits, not at entry.
Extracts tax lines, rates, taxable bases and supplier tax numbers.
Calculates expected tax using the rules your tax team has set for the entity and item type.
Tests supplier and buyer tax numbers for presence and format.
Highlights differences between stated and expected values, allowing a rounding tolerance you set.
Sends exceptions to the tax or AP owner with the working shown.
Bring a small sample and watch Flo work through it.
| Aspect | By hand | With the agent |
|---|---|---|
| Calculation | Tax is accepted as printed. | Tax is recomputed from the net amount. |
| Rates | Rates are looked up by memory. | Rates come from the maintained tax settings. |
| Mixed items | Lines with different treatments are blended. | Tax is checked line by line. |
| Registration | Vendor tax numbers are rarely checked. | Missing or mismatched numbers are flagged. |
| Exceptions | Questions go to tax by email. | Questions arrive with the figures and the rule used. |
| If | Then | Who decides |
|---|---|---|
| Computed tax equals billed tax | Marks the tax valid | AP team |
| Rate differs from the expected rate | Flags the line | Tax specialist |
| Tax is charged on an item treated as exempt | Flags a possible overcharge | Tax specialist |
| Vendor tax number is missing | Holds the invoice for a request | AP specialist |
| Tax is not shown separately | Flags a document problem | AP specialist |
| Cross-border supply with no tax shown | Marks reverse-charge possibility for review | Tax specialist |
The agent shows both methods and the difference. The tax specialist decides which applies.
The agent notes the effective date and asks for confirmation. The tax specialist decides.
The agent splits the lines and flags the allocation. The specialist confirms.
The agent marks it unknown and asks a person. The specialist adds it to the settings.
Talk it through with the team. We will map it to your steps and show where a person stays in control.
Start with the main tax regime the company deals with.
Compare agent calculations with a manual sample.
Include exempt and mixed treatments.
Add further jurisdictions with specialist sign-off on each.
A rising rate may point to one supplier or to a rule that needs updating. Review exception reasons before acting.
Quick answers to what people ask most about invoice tax validation.
Book a demoIt is checking that the tax on an invoice is stated and calculated correctly and that the supplier's tax details are present, so tax is booked correctly.
A VAT check is one form of it that looks at value added tax rates and numbers. Tax validation is wider and also covers sales tax, withholding and other taxes.
No. It applies the rules your tax team supplies and flags differences. Treatment decisions belong to tax professionals.
Your tax rules by entity and item type, and the vendor tax details on record. It can then compare each invoice with them.
What is invoice validation?
→What is an invoice VAT check?
→What is invoice PO matching?
→What is invoice currency conversion?
→Bring a small sample of real items. We will show what Flo handles on its own and where it hands over to your team.
