I'm here to help and share the steps on how you can transfer your data from QBDT to QBO, yusuf. 

Before we proceed, it's important to me to clarify the specific region of QuickBooks Online you're trying to transfer your data to. This help me provide more details further details about your concern.

In the meantime, here's how you can migrate your data from QBDT to QBO:

1. Log in with administrator credentials to access the company file that requires importing. 
2. Navigate to the Company section, then click on Export Company File to QuickBooks Online.
3. Initiate the export process by clicking on Start your export.
4. Provide administrator login details for your QuickBooks Online company account.
5. Choose the desired online company by clicking on Choose online company, and select the QuickBooks Online company you wish to replace with your company file. 
6. Continue by clicking on Continue. 
7. Proceed by clicking on Replace, confirm your decision by selecting Yes, go ahead and replace the data, followed by clicking on Replace.

For additional information, please refer to the article titled: Transferring Your QuickBooks Desktop File to QuickBooks Online. Please note that this article is relevant for the US version of the software.

If the steps above won't work in your situation, you can export QuickBooks Desktop company  data. 
 

Please know that I am here to support you every step of the way. Don't hesitate to reach out to me if you have any further questions or concerns. Together, we can ensure that you are able to effectively manage your books and feel confident in using our platform.