It's good for you to have different sources of income, exzolux!
You won't need a separate account. However, among the software or apps you mentioned, only Etsy can be connected to QuickBooks Self-Employed. See the details in this article: QuickBooks Self-Employed and Etsy.
For the others, you can wait until your transactions are transferred to your bank that is connected to QBSE. They will be downloaded nightly, and you can manage them anytime.
On the other hand, you will see the list of apps that can be connected to QBSE by clicking on the Gear icon and choose Labs. Other connections like Etsy, can be done within the apps's setting itself.
Let me know if you have other questions about connecting apps.
So how do I connect all the businesses (Youtube, Amazon) and name them etc? I don’t have to do that to Etsy because it can connect. But what about the others? How do I list them as a business and pay the irs for all the businesses?
Thanks for the reply, @exzolux.
Let me provide you with more information on how to record income in QuickBooks Self Employed.
Here's a couple of Community articles that you may find useful:
At this time, there's not a way to integrate YouTube with QuickBooks Self Employed. I'm going to submit feedback to the Product Development Team about bringing in a feature to allow this to happen. You can visit our Blog to see what's new to our Products, as well as see what's coming in the future updates. In the meantime, you can follow my colleague's @JessT post about waiting for the transaction to come in from your bank and categorize it.
If you have any additional questions or concerns, please don't hesitate and reach back out! Have a nice evening.