Hi there christina-ratte-,
It's important that all your transactions be entered correctly for your books to be balanced. QuickBooks Online is a great tool able to keep track of expenses and sales so you can see the profit of your company. I can provide some information about accounts payable.
In QuickBooks Online, all suppliers are assigned to the default accounts payable account in the respective currency, and there isn't a way to assign it to another. I can see that being able to assign each supplier to a specific accounts payable account would be a feature you'd like to see in the software. I recommend leaving feedback in the system by clicking on the Gear Icon, then Feedback. The comments made in that section are taken into consideration when designing new features for QuickBooks Online.
If you have any other questions feel free to reach out here.
