Hi in my company name do I put company name as my DBA name and legal name is my corporation name?

Good day, aleksander_2011. 

Thanks for posting your concern in the Community. 

The company name of your book depends on how you want to name it. With that said, you can enter anything that you are comfortable to use.

You can modify the name of your company anytime you want to. The steps below will guide you through on where you can enter the company name:

1. Go to the Gear icon. 
2. Click Account and Settings under Your Company.
3. Select Company from the left menu.
4. In the Company Name section, click the Pencil icon.
5. Enter the name of the company. 
6. Click Save. Then, Done.

To know more about the company settings, you can check out this article.

Please know that I am here to help you more in case you need further assistance in adding your information in QuickBooks Online. Take care!