I'll provide you with the initial steps before merging the duplicate account, @hateu1.
Let me help you clean your client's bank account in QuickBooks Online Accountant (QBOA) so reports and books are always accurate.
If your previous banking transactions are already reconciled, I suggest you leave the data untouched. We can exclude the new bank transactions (January to March) to fix the duplicates.
Go as follows:
- Go to the Banking tab on the left side.
- If the data is still in the For review, select all the January to March transactions and click Exclude.
- If it's already classified, go to the Categorized section and undo them.
- Go back to the For review and undo them.
For more details, see this link: Unmatch downloaded bank transactions or move them to another account.
After that, you can now merge the accounts. Before that, ensure to save the reconciliation reports, so the transactions remain on the linked account and stay reconciled.
- Go to the Accounting tab and then select the Chart of Accounts.
- For that account you want to keep, take note of the Account Type, Detail Type, and Tax form information.
- Go to the Chart of Accounts again and edit the bank you won't keep.
- Enter the data your take note of in Step 2.
- Select Save and then Yes, merge accounts.
Furthermore, check out these articles below on how to fix incomplete transactions and fix some reconciliation errors in QBOA:
If you need further help with managing your banking, please leave a comment below. Happy to offer my support in any way I can.