The company said the offer applies to its Combos C and D. TaxWorks Combo C includes the federal 1040 and forms 1041, 1065, 1120 and 1120S, all states and the tax planner. New users pay $1,995 while the renewal price is $2,895. List price is $3,495. Combo D comprises all systems, all entities and all states. First-time users pay $2,395 while those who renew by September 15 are charged $3,295. List price is $4,295.