Your auditors means they have made some adjustments to your ledger after the audit. They have enclosed an audit adjustment entries for your updating your last year's ledger in line with the final figures as shown in the audited financial statements.
So, you just input all the enclosed adjustment, after approval by your director, through Peachtree in the normal manner. Check for its accuracy thereafter.
When you pick up the opening balances in this new year's ledger, use the adjusted closing balances of the last year's ledger.