# The counterparty is registered through a fiscal representative

Source: https://developer.avalara.com/avatax-for-vat/iup2547584087773/

# The counterparty is registered through a fiscal representative

Learn how to specify if a counterparty is registered through a fiscal representative for VAT calculations.

**Element type:** Required

**Endpoints/models used:** [TransactionParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionParameterModel/), [TransactionLineParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionLineParameterModel/)

Your integration should allow users to specify whether the counterparty in a sales transaction is registered through a fiscal representative in a given country calculating VAT. This is done using the `IsCustomerRegisteredThroughFiscalRep` parameter in the [TransactionParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionParameterModel/) or [TransactionLineParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionLineParameterModel/). You can also add this information to the supplier/customer table.

**Example**

```
{
  "parameters":[
    {
      "name": "Transport",
      "value": "none"
    },
    {
      "name": "IsCustomerRegisteredThroughFiscalRep",
      "value": "false"
    }
  ],
  ...
}
```