Keep in mind, you can only able to convert data from QB Desktop CA version to QB Online CA version. You can utilize the trial version for any supported QB Desktop CA version to upgrade your company file (i.e 2020-2023) and convert it to QBO CA version.
https://quickbooks.grsm.io/Canada
But you will need a workaround to convert your company file to QB Online Singapore version.
https://quickbooks.grsm.io/Singapore
You may have 2 ways:
1. Utilize a migration tool. i.e TPExporter for Desktop and TPImporter for Online
https://transactionpro.grsm.io/qbo
2. Purchase a 3rd party conversion service.
