Hey there, Stefanie83.
At this time, there isn't a way to merge two QuickBooks accounts. This would need to be done manually. I can see that being able to merge accounts would be beneficial for you, so I recommend leaving feedback for our developers by clicking on the "Assistant" feature and typing submit feedback. Choose the "Feature request" option from the prompts. Comments are viewed and considered as they create new features and updates for QuickBooks.
Feel free to reach back out if you have any other questions.
