Accounting and tax software works by converting business events into structured financial records. An invoice, bill, payment, payroll run, asset purchase, or bank transaction is classified, posted as balanced debits and credits, and retained with the details needed to explain balances and produce reports.
Tax functions build on those records but add separate questions about entity, jurisdiction, tax treatment, timing, rates, and filing forms. Reliable systems therefore combine transaction capture, subledgers, reconciliation, controlled adjustments, period close, tax mapping, permissions, and audit evidence rather than merely totaling income and expenses. The sequence and control boundary matter.