# Task 4 self-review

- Verdict: pass
- Scope: BigDecimal salary calculation engine and input/override/result models.
- Evidence: `mvn -Dtest=SalaryCalculationEngineTest test` -> 6 tests, 0 failures, 0 errors.
- Contract check: base floor/ceiling, user overrides, contribution rates, special deduction, cumulative month 12, prior withheld tax, annual tax brackets, zero contribution, and 9802 validation.
- Blockers: none.