## What billing information is for

Billing information goes on the tax documents for
[topping up credit](https://www.bulkgate.com/en/helpdesk/payments-and-wallets/purchasing-credit/), and it decides whether VAT
is added to your payment. It is kept **separately for each
[wallet](https://www.bulkgate.com/en/helpdesk/payments-and-wallets/creating-wallet/)**, so each one can invoice a different
entity.

Filling it in is not technically mandatory — you can top up without it. The
portal will warn you during top-up with `Billing information is not filled.`
though, and without it you get no proper tax document.

## Where to fill it in

Two routes, both leading to the wallet detail:

| From | Where |
|:--|:--|
| Left menu | `Payments` > `Billing information` |
| Wallets | `Wallets` > pick a wallet |

In the `Billing information` section fill the fields in and store them with
`Save`; `Cancel` discards unsaved changes.

| Field | What goes in it |
|:--|:--|
| `First name`, `Last name` | Contact person |
| `Email` | The address the tax documents are sent to |
| `Company` | Company name |
| `Company number` | Registration number |
| `Company VAT` | VAT identification number — see [VAT and the reverse charge](#vat-and-the-reverse-charge) |
| `Street`, `City`, `Zip`, `Country` | Registered address |

> [!NOTE]
> The country also drives the currency of the wallet: Czech koruna for the Czech
> Republic, euro for every other country.

> [!IMPORTANT]
> On a [wallet shared with you by someone else](https://www.bulkgate.com/en/helpdesk/payments-and-wallets/connect-wallet/) your
> access may be `Read only` — then you can see the details but not change them.

## VAT and the reverse charge

BulkGate is based in the Czech Republic, and the tax treatment follows from where
you do business:

| Where you are from | VAT ID | What happens |
|:--|:--|:--|
| **Czech Republic** | with or without one | VAT is **always** charged at the Czech rate |
| **EU** outside the Czech Republic | valid, verified VAT ID | VAT is **not charged** — the reverse charge mechanism applies |
| **EU** outside the Czech Republic | missing or unverified | VAT is charged at the **rate of your country** |
| **Outside the EU** | — | VAT is not charged |

The rate that applies to you is shown in the last step of the top-up, on the
`VAT` line.

### How the VAT ID is verified

The portal first checks the **format** for your country and then asks the
European [VIES](https://ec.europa.eu/taxation_customs/vies/#/vat-validation)
register whether such a VAT ID actually exists. It fills in the country prefix
itself, so you may write it but do not have to.

> [!WARNING]
> When a VAT ID fails verification, the portal warns you during top-up with
> `Invalid VAT number. You will be charged with VAT.` Check your number directly
> in [VIES](https://ec.europa.eu/taxation_customs/vies/#/vat-validation) and fix
> it in your billing information before you top up — once the payment is made the
> document cannot be rewritten.

> [!CAUTION]
> The VIES register goes down now and then, and individual countries have
> outages of their own
> ([availability overview](https://ec.europa.eu/taxation_customs/vies/#/self-monitoring)).
> If you have a VAT ID filled in and verification happens to be unavailable, **the
> top-up page will not open at all** and ends with an error. Try again in a while,
> or [contact support](https://www.bulkgate.com/en/contact-us/).

The documents issued are in `Payments` > [Invoices](https://www.bulkgate.com/en/helpdesk/payments-and-wallets/invoices/).