Firstly clarify your nature of transaction if you are selling the entire business or its unit or some machinery or any right.
1 if you are selling entire business it will be covered as business income and not capital gain income.
2 if you are selling a unit or some machinery or any right and if it's long term capital gain then you will face capital gain tax.
And now you have only one option to save tax i.e. to invest in startup bonds specified by government u/s 54EE.
Earlier you had option to save capital gain by investing in bonds of NHAI, RERC etc u/s 54EC but now it has been restricted to sale of land or building only u/s 54EC by budget 2018.
So you can only save tax by investing in startup bonds.
Or you can even save tax by investing the entire sale consideration in residential house if you currently own only 1 house.
Hope you find the information helpful if you do please rate it 5 and provide your valuable feedback for my improvement.
Thank you
I have provided you with 2 options which are only available for saving capital gain.
I don't know what clarification you are asking for.