agent's tax lookup used the billing address instead of shipping: wrong VAT applied

TL;DR

For goods, VAT is generally determined by the shipping (delivery) address, not the billing address: the agent's tax lookup used the wrong input and applied the wrong rate. Feed the shipping address into the tax lookup for goods, keep billing address for the invoice header, and validate the resulting VAT treatment against the destination country's rules. Route ambiguous cases to human review.

agent's tax lookup used the billing address instead of shipping: wrong VAT applied

Use this when

• An agent applied the wrong VAT using the billing address
• Tax lookups run on the wrong address type
• Cross-border goods invoices show incorrect VAT

Not for this skill when

• The product is a digital service (different place-of-supply rules)
• The VAT rate itself is wrong for the right jurisdiction
• You are debugging tax-exempt customer handling

Steps

1. Identify the affected invoices and confirm the tax was computed from the billing address. Expected: The error is confirmed.

2. Determine the correct place-of-supply rule for the transaction type and countries involved. Expected: The right rule is explicit.

3. Change the tax lookup input to the shipping address for goods (keeping billing address for the header). Expected: The lookup uses the correct input.

4. Recompute tax on the affected invoices and issue corrections. Expected: The invoices are fixed.

5. Add a validation: the agent must state which address drove the tax decision on every invoice. Expected: The decision is auditable.

6. Route cross-border or mixed goods/services invoices to human review. Expected: The hardest cases get a person.

Tool compatibility

Tax engines (Avalara, TaxJar, Stripe Tax); EU VAT place-of-supply rules for goods.

Variant phrasings

agent VAT wrong address tax lookup

The error phrased directly.

billing vs shipping address VAT goods

The rule contrast as a phrase.

place of supply shipping address VAT

The technical term phrasing.

Why it happens

VAT place-of-supply rules assign taxing rights based on where goods are delivered, not where the buyer is billed: the shipping address determines the jurisdiction for goods in most regimes including EU VAT. An agent that feeds the billing address into the tax engine gets a confident, wrong answer, because the engine cannot know the input was the wrong address type. The invoice then carries the wrong rate, and the business under- or over-collects tax. Making the address choice explicit and auditable turns a silent misapplication into a checkable decision.

Edge cases / pitfalls

• Digital services follow different place-of-supply rules (often the customer's location); do not apply the goods rule blindly.
• Triangulation and chain transactions have special rules; escalate those to a tax advisor.
• Exempt customers need exemption certificates on file regardless of address; the address fix does not replace that.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_n1A1SkMAYDoqCSjQMIMCQA