How does the “ask my accountant” feature work in Quickbooks online when you are setting up your account?

Welcome to the Community, @Skiwee10. Thanks for choosing QuickBooks Online (QBO) as your accounting partner. I'll provide the details regarding your concern. 

The "Ask My Accountant" feature works as a holding account when you aren’t sure which account to use for your transactions. Thus, you'll need assistance from your accountant to confirm the appropriate accounts. You can add this from the Chart of Accounts menu since you're in the process of setting up your company. 

Once done, you can choose this account from the Category details section of a transaction. Here's what it looks like: 

I recommend running the Account QuickReport of the "Ask My Accountant" account from the Chart of Accounts menu. It helps you view all its associated transactions within a specific period. Just enter the account name in the Search box and select Run report from the Action column. Then, click the Email icon so you can send the report to your accountant. The screenshot below serves as your visual guide. 

Lastly, I suggest visiting this website: Chart Of Accounts Overview. It contains in-depth details about the account types, editing, hiding, and deleting accounts in the program. Just go to the QuickBooks Online sections. 

I'll lend a helping hand if you need further assistance. Keep safe always, @Skiwee10.