In rare cases, a bank may process a transaction with an incorrect total. If this happens, your first step should be to contact your bank directly to have the error corrected.
After the bank has resolved the issue, you will need to create a Journal Entry in Ledger to adjust your records accordingly. This involves debiting or crediting the bank account and applying the corresponding opposite entry to the original offset account so that everything is properly aligned.
If you need guidance on how to determine the correct debits and credits, please refer to Understanding Debits and Credits.