> For the complete documentation index, see [llms.txt](https://dev.ropo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.ropo.com/guides/basics/invoice/construction-site-information.md).

# Construction site information

Construction invoices in Finland may require construction site identifiers. Send them on the invoice `dataset`.

### Fields

* `TA0001`: Construction site ID
* `TA0002`: Construction site number
* `TA0003`: Worksite register flag (`Y` / `N`)

Ropo recommends sending both `TA0001` and `TA0002`.

### Example

```json
{
  "datastream": {
    "dataset": [
      {
        "jobtype": "0",
        "customertype": "1",
        "company": "Main contractor Ltd",
        "address": "Example street 1",
        "postcode": "00100",
        "city": "Helsinki",
        "billdate": "2026-02-06",
        "paydate": "2026-02-20",
        "sendtype": "evoice",
        "evoice": "003722059054",
        "evoiceint": "003714377140",
        "TA0001": "TA-FI-EXAMPLE0001-B",
        "TA0002": "1234",
        "TA0003": "Y",
        "freetext": "Worksite address:\nExample site\nExample road 10\n00100 Helsinki",
        "payrow": [
          { "desc": "Carpentry work", "count": "7", "amount": "55.00", "taxpr": "24" }
        ]
      }
    ]
  }
}
```


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