Hello @userjoan-lee,

When exporting a company data from the desktop version of QuickBooks to the online one, we'll have to choose the correct online account which has an active subscription. Let me outline the steps so you can completely export your data.

1. Go to Company.
2. Select Export Company File to QuickBooks Online.
3. Click Start your export.
4. Sign in as the admin to your QuickBooks Online company.
5. Under Choose online company▼, choose the correct company you want to be replaced.
6. Enter Agree in the text field.
7. Select Replace.
8. Click Yes, go ahead and replace the data.

In addition, here's an article you can read to learn more creating a copy of your company data: Move your QuickBooks Desktop file to QuickBooks Online.

Lastly, I've got you this helpful article for ideas about the expected outcome of your data after the export process: What to expect when you switch from QuickBooks Desktop to QuickBooks Online?

Please know that the references included in this post are base on the US version of QuickBooks but the same principles applied to your current version.

Keep me updated in the comments if you have any other questions. I'll be here to lend a hand.