If you are using QB Desktop 2020 UK version or older versions, you can buy a one time license for QB Desktop 2020 UK version to make sure you can still open your existing file. Otherwise, you may need two ways to migrate data to QBO Accountant Ireland version:
1. Utilize a migration tool. i.e TPExporter for Desktop, TPImporter for Online
2. Purchase a 3rd party migration service.
Contact us in private for details.