# Duett

[Duett](https://duett.no/) is a Norwegian accounting system and it supports a variation of file formats. Moment has selected to support two of these. Their native format and Mamut (GBAT10) format.

Duett format is supported natively, so this can be used by all, while Mamut format requires an add-on installed in Duett. Not all accounting companies has this add-on, check with yours prior to select using the Mamut format.

The two formats will both result in same data in Duett, the only differences are some limitations on field sizes. And for Duett there are three files that must be selected/imported.

## Export configuration

Configuration of export is to be done following the standard [configuration](/help/moment-by-topic/integrations/file-exports.md#accounting-export).

There are two selections to chose from since there are two types of files

#### Duett

Fields that can be defined when selecting to use Duett native format, some are pre-defined, but change according to your Duett setup.

* Ledger account: Define the account number to be used for ledger. Default 1500
* VAT account: Define the account number to be used for VAT rows. Default 2700
* Accounting project: Select if project is to be included and how to get project information
* Accounting department: Select if department is to be included and how the get the department information.

![](/files/-McyBokgKrUh-22Xpvot)

#### Duett (Mamut)

Fields that can be defined when selecting to use Mamut format, some are pre-defined, but change according to your Duett setup.

* Accounting project: Select if project is to be included and how to get project information
* Voucher code for invoices: Define the code used for invoices. Default 1
* Voucher code for credit notes: Define the code used for credit notes. Default 3

   

![](/files/-McyCiFSAixtFosRr5en)

## Files

### Native format

The native format consists of three files, that must be selected upon importing.

* VB\_BILAG.TXT
* VB\_KUNDE.TXT
* VB\_RESK.TXT

The files are position based, and there are some restrictions using this format.

* Invoice number must be numeric, and no longer than 7 digits.

If project or department is required/used one must be aware of these limitations:

* Project number must be numeric, and not longer than 5 digits
* Department number must be numeric, and not longer than 3 digits

### Mamut format

The Mamut format consists of one file only. 

The standard Mamut (GBAT10) file format can be found [here](/help/moment-by-topic/integrations/file-exports/file-export-accounting-system/mamut.md#file).

#### Duett specific Mamut fields/differences:

Currently none.


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