Abstract: A computer-implemented method including: receiving data representing updates to transaction entries in a ledger of an accounting system, each transaction entry identifying an account that corresponds to the transaction, at least some of the updates a) each changing the identified account from a first account to a second account and b) having been submitted by multiple users of the accounting system; analyzing the updates to infer a correlation between the first account and the second account; generating a rule defining a modification of transaction entries, wherein the rule, if applied to transaction entries received by the accounting system, would modify transaction entries identifying the first account to identify the second account; and storing the rule in a storage system such that the stored rule can be accessed and executed by a computer program executing on one or more computer systems, the execution of the rule causing the modification of the transaction entries defined by the rule.