Final answer:
The error would be included on the bank reconciliation as a deduction on the book side.
Step-by-step explanation:
In this scenario, the error made by recording the transaction in the general journal as $2,000 instead of $200 would be included on the bank reconciliation as a deduction on the book side.
When preparing a bank reconciliation, we compare the company's records (the book side) with the bank statement (the bank side). Since the company mistakenly recorded the transaction for $2,000, which is $1,800 more than the actual amount, this error needs to be deducted from the book side to match the correct transaction amount of $200.