TAC Tax Accountant Course Bookkeeping Theory 2023 Goal for Passing ● Basic Master/Rapid Learning Supplementary Problems No. 1 to No. 4 Each set includes a problem sheet, an answer sheet, and an answer/explanation sheet. The cover of the problem sheet and answer sheet has the character "原" (gen - original) marked in yellow to indicate the original copy. The answer/explanation sheets have writing on them.