# BT-64 Tax representative address line 1

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

## 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-64)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&bt=BT-64)

## In plain language

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.

## Where the field sits

BT-64 belongs to the Seller part of the invoice. UBL 2.1 Syntax: Invoice › cac:TaxRepresentativeParty › cac:PostalAddress › cbc:StreetName. CII (UN/CEFACT) Syntax: rsm:CrossIndustryInvoice › rsm:SupplyChainTradeTransaction › ram:ApplicableHeaderTradeAgreement › ram:SellerTaxRepresentativeTradeParty › ram:PostalTradeAddress › ram:LineOne.

## What goes wrong often

Avoid values like: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Valid Examples

- Musterstrasse 12
- Rue Exemple 8

## Invalid Examples

- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Related Fields

- [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

## XML Implementation

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

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

## 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)