It's important that all your transactions be entered correctly in your books for them to be well balanced. QuickBooks Online is a great tool able to help you keep track of expenses and sales in order to be able to see your profit. I can point you in the right direction to start a new account.
In order to start over you can follow the steps in this article. There are steps for both accounts that are less than 60 days old, as well as those older than that.
If you have any other questions, feel free to reach out here.
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