Journals can't be sent back to the batch once they have been posted. However, you can edit transactions if they have been posted.
To do this:
Click Financials then click Enquiries.
Click Nominal Transactions.
Search for the Journal using the filters.
Click the blue icon above the nominal code to view more options.
Click Edit Transaction Details.
Click Edit for each line you want to change in the Nominal transactions Details section, located in in the bottom half of the window.
There are some instances in which a change cannot be made and these include:
Where the period is hard closed.
Where the transaction has appeared on a VAT Return.