Can we use the E-Invoicing system as per KSA law?

Welcome to QuickBooks Community, akhan-masaraty-s!

Using an E-invoicing system as per KSA law isn't yet available in the system. I see how important to use this feature that will meet the new requirements for electronic invoicing regulations in Saudi Arabia.

For now, we can look for a third-party application that you can integrate with QuickBooks Online to comply with the new invoice regulation. In the meantime, you may review this article to learn more about creating invoices in QBO: Create invoices in QuickBooks Online. This includes details about  recording invoice payments.

Also, you'll want to check this article to gather more topics about handling sales and customer transactions in QBO: Manage Customers and income for QBO-International.

I'll be around if you have other concerns about QuickBooks Online, akhan-masaraty-s. Take care and stay safe always.

@akhan-masaraty-s 

First option, explore this app

https://quickbooks.intuit.com/app/apps/appdetails/qrify_add_qr_to_invoices/

Use the promo code FIATLUX10 and you will get a 10% discount off your monthly plan subscription

If you need more features with higher cost, we can recommend other options to explore.