You have me to help you convert your QBDT file to QBO, sales-hospitalit.
Since your file is still on the 2014 version, you'll have to use a trial version of the updated one. From there, you can convert it to QuickBooks Online.
I've also added this reference for the detailed steps to convert your data: Move your QuickBooks Desktop file to QuickBooks Online.
I'll be around if there's anything that I can help. Keep safe!
Which QB Desktop country version do you have?
South africa 2014
Afaik, according to their latest policy in 2020, Intuit Data Service only accepts to migrate data from QBD 2015-2018 to QBO SA.
You may have 2 options:
1. Utilize a migration tool. i.e TPExporter for Desktop, TPImporter for Online
2. Purchase a 3rd party conversion service.