When the Profit and Loss report is presenting an imbalance it usually means the Nominal Ledger Structure needs to have Nominal Accounts linked. Please follow these steps to see if Nominal accounts need linking:
On the Toolbar, click Nominal Ledger, Nominal Viewer.
Set the Structure Type to Balance Sheet.
Set the Maintenance Mode to Yes.
Click Apply.
Expand the balance sheet structure until you find a folder at Nominal Account level.
Select any nominal account.
Set the New Line Position to Below.
Set the New Line Type to Nominal Account.
Click Insert. If there are accounts that need linking, they will appear on the Nominal Account Selection screen and this will be the cause of the imbalance. If there are no nominal accounts to be linked, the Nominal Account Selection screen will be blank.