Thanks for using QuickBooks, imogen-lago-bigp.
I'd be delighted to help import your data from QuickBooks Desktop (QBDT) to QuicKBooks Online (QBO).
Since QBDT 2016 is an outdated version, you may need to use an upgraded version of the software when importing your data. But no worries, you can download a free trial version and use it in transferring your files to QBO.
Before we start, let's secure a backup copy of your QuickBooks Desktop company file to make sure that the data will be saved before upgrading. I'll show you how below:
Here's an article for your reference on how to create a back up company file: Create a Backup of your Company File.
Once done, you can download the free trial and most updated version of QBDT and then open the back up company file from there.
For the complete instructions on how download the trial version, kindly check out this link: Download a trial of QuickBooks Desktop.
Finally, you can start migrating your data from QBDT to QBO. Let me share the instructions below:
This article will guide you through the whole process of moving your QuickBooks Desktop file to QuickBooks Online.
Get back to me if you have other questions. I'm always happy to help you further. Keep safe and have a great rest of the day!