Most investment experts have adequate knowledge of how to save tax by investing in various financial products. They can guide you on which financial products provide how much deduction at the time of investment, how your returns are taxed, etc.
However, if you want to get into the details of certain things like filing your income tax returns, tax matters related to real estate, how to structure your succession planning if you have a lot of assets, how to handle your international investments, investments in exotic products, etc., you should consult a tax professional.