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!