Find Business Central invoices that never reached AvaTax

**Objective:** Find posted Business Central sales invoices dated from `{from-date}` to `{to-date}` that have no matching Avalara AvaTax transaction, optionally for customer `{customer-number}`.

**Step 1: List the invoices in Business Central**

Call `business-central-get-posted-sales-invoice` with `posting-date.from` set to `{from-date}` and `posting-date.to` set to `{to-date}`. If `{customer-number}` is not empty, also set `sell-to-customer-number` to it. If the result is truncated by `max-records`, say so and ask for a narrower range.

**Step 2: List the transactions in Avalara AvaTax**

Call `avalara-avatax-get-transaction` with `date.from` set to `{from-date}` and `date.to` set to `{to-date}`. If `{customer-number}` is not empty, set `customer-code` to it. Do not filter on `document-type`; keep each transaction's `code`, `document-type`, `status`, `total-amount` and `total-tax`.

**Step 3: Match**

Match each invoice `invoice-number` against the AvaTax `code`. For an invoice with no code match, look for a transaction with the same `customer-code` and `total-amount`, and report it as a probable match under a different code.

**Step 4: Report**

Give counts: invoices checked, matched, probable matches, missing. Then list the missing invoices with number, posting date, customer, `total-amount` and invoice tax (`total-amount-including-tax` minus `total-amount`). Also list AvaTax transactions in the range that match no invoice.

**Rules & Guidelines:**

* Tools whose names start with avalara-avatax- are on the avalara-avatax MCP server; tools whose names start with business-central- are on the business-central MCP server. Both servers must be connected.
* This prompt is read-only. Never call any create, update, delete, add, void, commit, adjust, refund or other action tool on either server.
* Report what the two systems show. Do not present results as tax advice or as a filed return.

**Validation:**

* If either side returns nothing, say so and report the other side only.
* Invoices posted with no tax may legitimately have no AvaTax transaction; flag zero-tax invoices separately.