Thanks for dropping by, @MariaMDA. 

Please know that the option to add a company logo on your vendor checks is still unavailable in QuickBooks Online (QBO). 

We recognize that each company has unique needs, and I can see how the feature you're looking for would benefit and empower your business. In the meantime, I recommend sending this request straight to our product engineers through feedback. This way, they can further review which parts of the program need enhancements and consider adding them to future updates.

To do so, you can follow the steps provided by my peer, @SirielJeaB above. If you want to get updates about the status of your feedback, you may visit the Customer Feedback page.

Furthermore, when you switch from QuickBooks Desktop to QBO, you may notice differences in how your books appear. Don’t worry, we’ll help you understand how your books were moved through this link: Learn how features and data move from QuickBooks Desktop to QuickBooks Online.

Please don't hesitate to leave a reply below if you have further concerns about using the product. We'll be right here to help you, @MariaMDA. Stay safe!