How do I remove transaction from my bank statement?

Statements are generated automatically once a month. They contain records of all account transactions that were made during the previous month. You cannot remove bank transactions from your account statement. If the statement of your account contains an unknown transaction you can call the bank and clarify it. For example, if by mistake the bank debited some money from your account, you can request a refund. However, the refund is going to be a separate transaction. So you cannot remove transactions  from your account statement.