Hi there, @satC.

Thanks for getting back to us. I'll share some details about migrating your data from QuickBooks Desktop (QBDT) to QuickBooks Online (QBO).

To migrate or move your data from QBDT to QBO, you’ll need to upgrade your software to the latest version. You can use the trial version to do this.

Please refer to these steps:

1. Back up your QBDT 2016 data first. You can follow the steps I shared above or refer to this article: Back up your QuickBooks Desktop company file.
2. Download a free trial of QBDT 2022 (ensure your computer meets the system requirements for the 2022 version).
3. Restore your QBDT 2016 data on your QBDT 2021 free trial.

Once done, you can now proceed with migrating your QBDT file to QBO. The steps to do this may differ depending on the QBDT version you're using. For further guidance, check out this article and proceed to Steps 2 and 3: Move your QuickBooks Desktop file to QuickBooks Online.

For more tips and other resources, I recommend visiting our website for future reference: Self-help articles.

Please post again or leave a comment in this thread if you have follow-up questions about the process or anything else. I'll be more than willing to assist. Take care.