Tax planning is done before the year closes, not after the ITR draft is ready. It covers the choice of regime, timing of receipts and investments, advance-tax instalments, and the deductions or exemptions that the facts actually support.
For businesses the same review looks at remuneration, interest, related-party charges, and the interaction with GST and TDS so that one compliance does not create a problem in another. Advice is written against the current law — not against a template from a previous year.