I'm here to clear out your confusion, gatehealing.
Yes, you can move your QuickBooks Desktop for Mac 2020 files to QuickBooks Online Simple Start. To understand how your books were moved, I recommend browsing this article: Learn how Features and Data Move from QuickBooks Desktop to QuickBooks Online.
If you're ready, you can start migrating your company data. Once done, you’ll receive an email confirmation that can take up to 12 hours.
I've also added this article that'll help you learn more about the steps you should take after moving your file to ensure your data is ready to go: What to do After you Migrate to QuickBooks Online.
In addition, you can connect your bank and credit accounts to QuickBooks Online. After that, the program will automatically download your transactions every night. If you can’t find your bank and credit but still want to add your transactions, you can manually upload them.
Aside from manually importing bank data, you can also import your other data from Excel to QuickBooks Online.
Lastly, I've added these resources that'll provide everything you need and resources for getting started with QuickBooks Online:
Please keep us posted if you have additional questions or concerns about moving your books. We want to ensure the migration process is seamless.
