Root element for Underpayment of 2007 Estimated Tax By Corporation Top of the form Top of the form Top of the form Top of the form Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Line 11 Line 12 Line 13 Line 14 Line 15 Line 16 Line 17 Line 18