TUTORIAL: Add "vatin" to standard fields

In most countries end customers pay a VAT (value-added tax). Companies issuing invoices with VAT need to have a unique identification number assigned. Local names and abbreviations of those numbers differ across countries (UID, DIČ, CVR, CBL, NIP, NIF, etc.). European Union seems to reference those numbers as "VAT identification numbers". Some open projects like Wikipedia and OpenStreetMap use "vatin" abbreviation for it. Add field of the same name to the TUTORIAL. Signed-off-by: Rafał Miłecki <[email protected]>
invoice-x · Nov 4, 2023 · dda1679 · dda1679
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diff --git a/TUTORIAL.md b/TUTORIAL.md
@@ -79,6 +79,7 @@ Standard fields:
 - `date`: the date invoice was issued
 - `invoice_number`: unique number assigned to invoice by an issuer
 - `amount`: total amount (with taxes)
+- `vatin`: [VAT identification number](https://en.wikipedia.org/wiki/VAT_identification_number)
 
 ### Parser `regex`