tell me how im wrong i dont get it explain from top to bottom please

Required information PA4-1 (Algo) Preparing a Trial Balance, Closing Journal Entry, and Post-Closing Trial Balance [LO 4-3, LO 4-5] [The following information applies to the questions displayed below.] Starbooks Corporation provides an online bookstore for electronic books. The following is a simplified list of accounts and amounts reported in its accounting records. The accounts have normal debit or credit balances. Assume the year ended on September 30, 2021. 3. Prepare a post-closing trial balance at September 30, 2021