Thanks for getting back here, @Reaksmeysk.

I'm glad that I've helped you with your initial concern. Let me share some insight about the digits limitation in the amount field in QuickBooks Online (QBO).

Currently, there's no QBO version that allows you to input more than 11 digits in the amount field of any transaction.

I recognize how the functionality to enter up to 13-digit in the amount field would be beneficial to your business. That said, I recommend sending your feedback to our Product Development Team. It allows them to review all the feedback we receive to ensure we’re meeting the needs of our customers.

1. Go to the Gear icon at the top.
2. Select Feedback.
3. Enter your comments or product suggestions.
4. Click Next.
   

Moreover, in case you want to navigate through QBO Advanced to familiarize yourself with the program, simply visit this link to proceed with the test drive: https://qbo.intuit.com/redir/testdrive_us_advanced.

On the other hand, you can also utilize what Fiat Lux-Asia shared above. However, the option to use the Khmer fonts for the description and memo fields is not possible within the program. It will be displayed like the screenshot below:

Please know that you're always welcome to post a reply in this thread if you have any other questions about your QBO account. I'll be here ready to assist you. Keep safe!