Hi there 929concepts,
It's vital that all your transactions are correctly entered so that your books can be well balanced. QuickBooks Online is a great tool able to help you keep track of your financials so that you can get a good view of the financials of your company. I can provide some information about starting over.
As stated by Fiat Lux - ASIA, accounts that are less than 60 days old can have all data removed from them to start from scratch. You can use the steps in the linked article to remove all data from the account. It's good to note that this does delete all data in the account and that this process is irreversible. if your account is older than 60 days, then this process will not e able to be used, and that a new subscription would be the only way to start over completely.
If you have any other questions, feel free to reach out here.
