Hi there,
Glad to have you join the Community. I'll be happy to share more info and help steer you in the right direction so you can get back to doing what you enjoy.
When importing journal entries in QuickBooks, it's important to make sure you adhere to the message you're receiving about the entry lines having debits or credits and not both. Doing this will help make sure your transactions are recorded successfully in QuickBooks. Here's a helpful article that shows you how to: Import journal entries in QuickBooks Online.
I encourage you to follow the importing steps provided in the article. You're welcome to ask questions. I'll be a message away.