If I have already entered all my banking and reconciled for every month can i go back and enter my banking for the year before

Hi vert-contracting,

Good job on entering your banking and reconciling for every month. QuickBooks is a robust program that's designed to simplify your work which saves you tonnes of time. I'd be glad to give you a hand with entering prior transactions. 

QuickBooks Online updates your bank balance as you enter payments received from customers and payments to vendors. Entering transactions may affect the balances on the accounts you've already reconciled. Since you've already reconciled, I suggest checking with your accountant first to ensure accuracy. If you need to unreconcile the transactions before entering the other ones, I recommend going through a QB ProAdvisor/Accounting professional. They have the right tools and resources to automatically unreconcile transactions. 

If you're not yet connected to an accountant and this is something you'd like to explore, feel free to search for one in your area here: Find a ProAdvisor.

If you don't have access to an accountant, you can undo a reconciliation by manually editing each transaction from the register. Follow the steps below to see how you can do this:

   1. Select the Gear icon on the Toolbar.
   2. Under Your Company, select Chart of Accounts.
   3. Locate the appropriate account for the transaction.
   4. From the Action column, select Account History.
   5. Identify the transaction to edit.
   6. In the reconcile status column (indicated by a check mark), repeatedly select the top line of the transaction to change the status of the transaction.

        Codes indicate the status of the transaction:
             C - Cleared
             R - Reconciled
             Blank - Not cleared or reconciled

   7. Select Save.
 

For additional tips on how to avoid undoing a reconciliation, take a look at this article: Avoid undoing a reconciliation. To see a more in-depth explanation of how to manually undo a reconciliation without an accountant, check out this article: How to unreconcile a transaction or undo a reconciliation.

Otherwise, if you need to enter transactions, I suggest checking out this article which shows you how to upload transactions: How to upload more than 90 days of bank transactions.

If you need further assistance with the steps, you can contact our QuickBooks Online Support Team. They have additional tools to pull up your account in a secure environment and do a remote session. Let me know if you have other questions. I'm here to help steer you in the right direction. Otherwise, enjoy the rest of your week! :)