I'm extremely confused on the income tax expense and the blank and incorrect boxes in the general journal. Please help!

The corporation performs adjusting entries monthly. Closing entries are performed annually on December 31. During December, the corporation entered into the following transactions. Dec. 1 Dec. 1 Dec. 1 Dec. 4 Dec. 8 Dec.12 Dec.15 DeC.17 Dec.23 Dec.26 Dec.26 Dec.27 Dec.28 Dec.29 Issued to John and Patty Driver 25,000 shares of capital stock in exchange for a total of $250,000 cash. Purchased for $220,800 all of the equipment formerly owned by RentIt. Paid $139,000 cash and issued a lyear note payable for $81,800. The note, plus all 12 months of accrued interest, are due November 30, Year 2. Paid $9,900 to Shapiro Realty as three months' advance rent on the rental yard and office formerly occupied by RentIt. Purchased office supplies on account from Modern Office Co., $1,400. Payment due in 30 days. (These supplies are expected to last for several months; debit the Office Supplies asset account.) Received $8,900 cash as advance payment on equipment rental from McNamer Construction Company. (Credit Unearned Rental Fees.) Paid salaries for the first two weeks in December, $4,500. Excluding the McNamer advance, equipment rental fees earned during the first 15 days of December amounted to $18,400, of which $12,300 was received in cash. Purchased on account from Earth Movers, Inc., $500 in parts needed to repair a rental tractor. (Debit an expense account.) Payment is due in 10 days. Collected $2,200 of the accounts receivable recorded on December 15. Rented a backhoe to Mission Landscaping at a price of $290 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks. Paid biweekly salaries, $4,500. Paid the account payable to Earth Movers, Inc., $500. Declared a dividend of 10 cents per share, payable on January 15, Year 2. Susquehanna Equipment Rentals was named, along with Mission Landscaping and Collier Construction, as a codefendant in a $24,000 lawsuit filed on behalf of Kevin Davenport. Mission Landscaping had left the rented backhoe in a fenced construction site owned by Collier Construction. After working hours on December 26, Davenport had climbed the fence to play on parked construction equipment. While playing on the backhoe, he fell and broke his arm. The extent of the company's legal and financial responsibility for this accident, if any, cannot extent of the company's legal and financial responsibility for this accident, if any, cannot be determined at this time. (note: This event does not require a journal entry at this time, but may require disclosure in notes accompanying the statements.) Dec.29 Purchased a 12-month public liability insurance policy for $8,880. This policy protects the company against liability for injuries and property damage caused by its equipment. However, the policy goes into effect on January 1, Year 2, and affords no coverage for the injuries sustained by Kevin Davenport on December 26. Dec-31 Received a bill from Universal Utilities for the month of December, $620. Payment is due in 30 days. Dec.31 Equipment rental fees earned during the second half of December amounted to $20,000, of which $16,100 was received in cash. Data for Adjusting Entries a. The advance payment of rent on December 1 covered a period of three months. b. The annual interest rate on the note payable to Rent-It is 6 percent. c. The rental equipment is being depreciated by the straight-line method over a period of eight years. d. Office supplies on hand at December 31 are estimated at $660. e. During December, the company earned $3,700 of the rental fees paid in advance by McNamer Construction Company on December 8. f. As of December 31, six days' rent on the backhoe rented to Mission Landscaping on December 26 has been earned. 9. Salaries earned by employees since the last payroll date (December 26) amounted to $1,300 at month-end. h. It is estimated that the company is subject to a combined federal and state income tax rate of 40 percent of income before income taxes (total revenue minus all expenses other than income taxes). These taxes will be payable in Year 2. No Date General Journal Debit Credit 1 Dec.31 Rent expense V 3,300 Prepaid rent V 3,300 2 Dec.31 Interest expense V 409 Interest payable V 409 3 Dec.31 Depreciation expense V 2,300 Accumulated depreciation: rental equipment 2,300 4 Dec.31 Office supplies expense V 740 Office supplies V 740 5 Dec.31 Unearned rental fees 3,700 Rental fees earned V 3,700 6 Dec.31 Accounts receivable V 1,740 Rental fees earned V 1,740 7 Dec.31 Salaries expense V 1,300 Salaries payable V 1,300 8 Dec.31 Income taxes expense Income taxes payable VNo Date General Journal Debit Credit 1 Dec.31 Rental fees earned 25,440 X Income summary 25,440 X 2 Dec.31 Income summary Salaries expense Maintenance expense 500 Utilities expense 620 Rent expense 3,300 V Office supplies expense 740 Depreciation expense 2,300 Interest expense 409 Income taxes expense 3 Dec.31 Income summary Retained earnings 4 Dec.31 Retained earnings 2,500 V Dividends 2,500