Trial Balance

Welcome to the Community,@anna_bolic.

I appreciate your interest in importing Trial Balance to QuickBooks Online. However, this option is exclusive to some countries (such as India) and is available in the QBO Plus version.

Since you're subscribed to a different country, you'll want to consider using a third-party app in QBO that can integrate your trial balance from Pronto into QBO. I'll show you how: 

1. Visit this site apps.intuit.com.
2. Choose your country.
3. Enter and look for an app in the search bar.
4. Select the app in the list.

You can always check out this guide here for further reference about importing trial balances: Import trial balances.

I’m always ready to assist if you have any other questions or concerns regarding the importing processes in QuickBooks. Feel free to reply to this thread. Tag me in your reply, and I’ll sprint back into action. Have a good one, and keep safe. 

@anna_bolic 

The best way to import a Trial Balance into QuickBooks Online is with the import type Journal Entry. NOTE: Any line in the import file that posts to an AR or an AP Account must reference a name (Customer or Vendor), and that name must already exist in the QuickBooks Online company file.

https://transactionpro.grsm.io/qbo

Another option, purchase a 3rd party conversion service.