I believe client accounting firms, and probably companies themselves, would appreciate standardized accounting workpapers such as a loan amortization schedule, salary accrual schedule (to accrue salaries daily based on historical rates), depreciation schedule, and more. If you think of categorizing transactions as not only putting them in their final resting place (an account) but also as tagging them with special attributes (e.g. the attribute of needing to be accounted for in an aforementioned schedule), you'll have a killer innovation IMO. Many will tell you the dream of standardization is unrealistic but accounting methods are finite and a majority are well defined. You don't have to cover all use cases to win the hearts and minds of most who will see the value in prebuilt, integrated worksheets. Just an opinion from a client accounting manager who loves tools and applied theory.