# BT-66 Tax representative city

City of the seller tax representative postal address.

## Quick answer

> **Seller details**: Who issued the invoice and how the recipient can identify that business reliably.

- [Validate XML](/en/xrechnung-validator?source=resource&bt=BT-66)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&bt=BT-66)

## In plain language

The city completes the postal address that tax authorities and recipients may need to identify the fiscal representative.

## What you usually enter here

City or locality name

Typical valid values include: Berlin, Paris

Optional overall, but expected when the full tax representative address is provided.

## Where the field sits

BT-66 belongs to the Seller part of the invoice. UBL 2.1 Syntax: Invoice › cac:TaxRepresentativeParty › cac:PostalAddress › cbc:CityName. CII (UN/CEFACT) Syntax: rsm:CrossIndustryInvoice › rsm:SupplyChainTradeTransaction › ram:ApplicableHeaderTradeAgreement › ram:SellerTaxRepresentativeTradeParty › ram:PostalTradeAddress › ram:CityName.

## What goes wrong often

Avoid values like: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Valid Examples

- Berlin
- Paris

## Invalid Examples

- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Related Fields

- [BT-64 Tax representative address line 1](/resources/xrechnung/bt-64-tax-representative-address-line-1)
- [BT-67 Tax representative post code](/resources/xrechnung/bt-67-tax-representative-post-code)
- [BT-69 Tax representative country code](/resources/xrechnung/bt-69-tax-representative-country-code)

## XML mapping and field facts

Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.

### Field ID:
BT-66

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
60 characters

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:TaxRepresentativeParty/cac:PostalAddress/cbc:CityName
```

### CII (UN/CEFACT) Syntax
```
/rsm:CrossIndustryInvoice/rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTaxRepresentativeTradeParty/ram:PostalTradeAddress/ram:CityName
```

## Create an XRechnung from your PDF

The converter reads the invoice and shows the fields it found before download, so you can check and correct the values. No PDF? Fill in the XRechnung directly in the form.

- [Convert invoice](/en/pdf-to-xrechnung)
- [Fill in XRechnung in the form](/en/create-xrechnung)

Download requires an account. Subscriptions from €10/month with annual billing (excl. taxes), or €5 per conversion (excl. taxes) without a subscription.

## Official sources and tools

- [KoSIT Validator](https://erechnungsvalidator.service-bw.de/)
- [XRechnung Standard](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)