A field-by-field guide to Tax Estimator: what to include, what to exclude, and how to avoid unit mistakes.
Inputs are the only “truth” the model sees. Clean input definitions make outputs like tax payable and old vs new comparison meaningful.
This guide helps you define financial year, income sources, deductions, and tax already paid so the calculator reflects your real scenario—not a spreadsheet fantasy.
Before typing, decide whether values are monthly, annual, per-unit, or per-order. Most errors come from mixing these silently.
If you’re unsure, re-run with a simpler scenario and confirm the output direction.
Key inputs: financial year, income sources, deductions, and tax already paid.
Be consistent about units (monthly vs annual) and scope (include fees/taxes if they exist in real life).
Compare outputs like tax payable and old vs new comparison across scenarios instead of trusting one number.
If the decision changes under downside assumptions, build a buffer or revise the plan.