Allow me to chime in and help share some information about assuring successful QuickBooks Desktop (QBDT) to QuickBooks Online (QBO) migration, wopdeweegh.
Before we proceed, may I know what version of QuickBooks Desktop and country you are migrating to a specific region of QuickBooks Online? This can be why you migrated it twice due to migration target compatibility issues. Also, are you currently using a migrator tool (third-party data service) to convert your QBDT to QBO? If so, you'll have to contact their support so they can guide you on how to run and execute it seamlessly.
For QuickBooks Online International, there are tools and services available from third parties that allow you to transfer and import data from your previous accounting software. To get detailed instructions, I recommend reviewing this article for a comprehensive guide: Common questions about importing data to QuickBooks Online.
In addition, if you're converting the QBDT US version, this is how the features and terms will be named and moved in QBO US: Learn how features and data move from QuickBooks Desktop to QuickBooks Online. It also applies when you're using a trusted third-party migrator tool.
If you have additional concerns regarding migration in QuickBooks Online, feel free to post them here in the Community space.
