If these are expense transactions and went to a single expense account category (not split to more than expense accounts), you can do the batch category to a different account.
Here is how to batch reclass expense transactions:
From the left Dashboard > Select Expenses > From Expense Transactions page, select Filter the account category that you want to go to different category > Once you've revised Category page, go to the checkbox to date column (select all) and under batch actions, select Categorize selected and proceed with the steps.
In QuickBooks Online Accountant, we have the reclassify tool which gives the option to batch edit transactions. Like you can reclassify accounts, classes, and sales tax code in bulk. That said, I recommend contacting your Accountant for them to perform this for you.
However, there are also accounts that you can't move. Some of these are:
You can change the class for invoices, salesreceipts, checks, or bills with items (products or services) on them. However, you can’t change the accounts.
You can’t change the payment account (bank or credit card) for expenses.
You can’t change the account or class for inventory adjustments since they’re connected to your inventory shrinkage and asset accounts.
You can change the expense account for billable expenses, but not the income account for the related income transactions.
You can manage your payroll transactions in the Payroll menu.