Check a Rillet invoice's tax against AvaTax in one question

**Objective:** For the Rillet invoice numbered `{invoice-number}`, compare its tax and totals with the AvaTax transaction recorded for it (AvaTax company `{company}`, default: the only or default company).

**Step 1: Read the invoice from Rillet**

Call `rillet-get-invoices` and pick the row whose invoice-number equals `{invoice-number}`. The tool has no filters, so match on the returned rows. If no row matches, report that the invoice is not in Rillet and stop. Keep invoice-number, customer-id, invoice-date, subtotal, tax-amount, total, status and purchase-order-number.

**Step 2: Name the customer**

Call `rillet-get-customers` and find the row whose customer-id equals the invoice's customer-id. Keep its name.

**Step 3: Find the AvaTax transaction**

Call `avalara-avatax-get-transaction` with `code` set to `{invoice-number}` (and `company` if given). If nothing comes back, call it again with `purchase-order-number` set to the invoice's purchase-order-number when there is one, then with a `date.from` and `date.to` window of the invoice date and the customer's AvaTax customer-code if you can find it with `avalara-avatax-get-customer` using `name.contains`. If still nothing, report the invoice as present in Rillet and absent from AvaTax, and stop. If several transactions match, list them and stop.

**Step 4: Compare**

Compare Rillet tax-amount with AvaTax total-tax, Rillet subtotal with AvaTax total-taxable plus total-exempt, and the invoice date with the AvaTax date. Treat differences under 0.01 as equal. If the AvaTax document-type is not a sales invoice, say so.

**Step 5: Report**

Give a short table: field, Rillet value, AvaTax value, difference. End with one verdict line: Matches, Tax differs, Amount differs or Not found.

**Rules & Guidelines:**

* Tools whose names start with avalara-avatax are on the avalara-avatax server; tools whose names start with rillet are on the rillet server. Both servers must be connected.
* This prompt is read-only. Never call any AvaTax action tool (for example `avalara-avatax-transaction-create`, `avalara-avatax-transaction-adjust`, `avalara-avatax-transaction-void`, `avalara-avatax-transaction-commit`) or any Rillet add, update, apply or set tool (for example `rillet-add-invoice`, `rillet-update-invoice`, `rillet-add-credit-memo`).
* Report what the two systems show. Do not present the result as a filed tax return or as tax advice.
**Validation:**

* If either system returns nothing, say which one and stop.
* If the currencies differ (Rillet currency against AvaTax currency-code), do not compare amounts; report the mismatch.