Tax impact on RSUs and ESOPs arise only when you sell them. Holding ESOPs or RSUs don't have to reported in your income tax return. They'll be mentioned in the perquisites section of your Form 16.
It's only when you sell these vested stocks and make a profit, that you will need to report this profit in your income tax return.
This guide will walk you through reporting capital gains from sale of RSUs and ESOPs.
Do note that if these are foreign company's stocks you are vesting, you must fill out additional disclosures such as Schedule FSI, Schedule FA in your income tax return.