Hi there, @info1802.
I'll help import your history of invoices from QuickBooks Desktop to QuickBooks Online.
You can migrate your data from QuickBooks Premier Desktop (QBDT) 2016 to QuickBooks Online (QBO). With QBDT's 3-year life cycle of its company data and you're using the 2016 version, upgrading it to the latest versions first is a must before the migration process.
Therefore, let's download first a trial version of QBDT 2016, QBDT 2019, and QBDT 2021 or QBDT 2022 then upgrade your company data. Use the following links below for the steps:
Once done upgrading, follow the steps in this article and use the migration tool to convert your company data: How to Import QuickBooks Desktop Company File to QuickBooks Online?
I'll also include this reference to learn more about steps you should take after you move your file and make sure your data is ready to go: What to do after Moving from QuickBooks Desktop to QuickBooks Online?
I've got you covered if you need further assistance with the migration or if you've got questions while working with the new version of QuickBooks. Take care always!
Disclaimer: All articles in this response are intended for customers based in the US but you don't have to worry since the same process works for the product version you're using.
