Call and ask Intuit Data Service to convert your QBD file to QBO. Should you need to resolve in due course, consider purchasing a 3rd party file conversion service to 2020 version. Then you may self convert your data file on trial license of Pro 2020 to QBO.
Am I able to migrate any of my data from QB Pro 2008 into my new QB Self Employed?
We're unable to migrate data from QuickBooks Pro to QB Self-Employed, mikede1025.
If you're planning to use QBSE, you'll want to enter your data manually. You can sign up here.
Furthermore, QBSE is for self-employed individuals. There are functions from QB Pro that's unavailable in QBSE. You might want to compare the products to see the difference: https://quickbooks.intuit.com/products/.
Check out these articles to learn more about QBSE: