> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goeva.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Write to Eva to get your agent ready

> Use your account code when you message Eva on WhatsApp after signup.

After your card is registered, Eva shows an account code and a **Write to Eva
on WhatsApp** button. On a computer you also see a QR code.

**1. Open the chat**

Tap the button or scan the QR code. The message already includes your
business and account code; send it with the code intact.

**2. Prepare your business with Eva**

Eva uses the code to find your account and guides you through your website
or catalog, agent knowledge, WhatsApp connection, testing, and activation.

The code identifies your account for this chat; it is not a password. If you
do not write during the trial, a fixed reminder stays in Eva. You can also
enter your account and set up the agent yourself.

Need a Mexican tax invoice? Tell Eva and have your tax status certificate ready
before the first charge. [How to get the invoice](https://docs.goeva.ai/en/billing/invoices.md).


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