How can I customize text in invoices? to begin with, I need them in Spanish (they're in English)?

Hello there, Lara.

You can set your invoices to the English version by changing the language in your QBO account from Spanish to English. Here's how:

1. Go to the Sales menu and select Customers.
2. Find the customer whom you want to send an invoice in Spanish version.
3. Click the Edit button.
4. In the Customer window, scroll to the Payments section.
5. Click the Language to use when you send invoices drop-down arrow. Then, choose Spanish.
   

The built-in text display, such as fields on your invoice, will remain unchanged. You will see the English version when you send or print the invoice. Here's an article that provide step-by-step instructions on how to personalize your sales forms: Customise invoices, estimates, and sales receipts.

Additionally, you can refer to this article for more information about changing the language in QuickBooks Online. It also provides detailed instructions when changing the language settings within the QuickBooks Online platform to suit your preferences and requirements: Change language in QuickBooks Online.

Please inform me if you have further concerns about modifying your books' display preferences and managing your invoices. I'm here to help.