# BT-64 Tax representative address line 1

Primary street and house-number line of the seller tax representative.

## Quick answer

Primary street and house-number line of the seller tax representative.

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

- validate
- convert

## In plain language

Primary street and house-number line of the seller tax representative.

Primary street and house-number line of the seller tax representative.

Needed when the invoice must identify the full postal address of the fiscal representative.

## What you usually enter here

Street and number

Typical valid values include: Musterstrasse 12, Rue Exemple 8

Optional overall, but becomes part of the required tax representative address when BG-12 is used.

## What goes wrong often

Avoid values like: , AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Examples in context

Needed when the invoice must identify the full postal address of the fiscal representative.

Optional overall, but becomes part of the required tax representative address when BG-12 is used.

## Valid Examples

- Musterstrasse 12
- Rue Exemple 8

## Invalid Examples

- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Related Fields

Needed when the invoice must identify the full postal address of the fiscal representative.

- [BT-65 Tax representative address line 2](/resources/xrechnung/bt-65-tax-representative-address-line-2)
- [BT-66 Tax representative city](/resources/xrechnung/bt-66-tax-representative-city)
- [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-64

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
100 characters

### Since Version:
Conditional

## XML Implementation

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

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

## Why the standard cares about this field

### Business Context
Needed when the invoice must identify the full postal address of the fiscal representative.

### Legal Requirement
Optional overall, but becomes part of the required tax representative address when BG-12 is used.

## Official sources and tools

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