Sale of property upon death of parents

The parents having expired, the ownership of the property has devolved upon the children who are the legal heirs. Technically, there is no legal infirmity in children jointly executing the conveyance deed. However, it is prudent and practical to have the mutations carried out in the revenue/revenue records before executing the sale deed.

Yes.  You and your siblings may jointly sell the property, but getting a mutation in your names in revenue records is better.

You people may first obtain legal heirship certificate and then can sell the property jointly.

Since succession is open on death of the property owner, the legal heirs become the successors in interest to succeed the estates left behind, therefore on the basis of the legal heirship certificate the legal heirs have been established hence they can sell the property even without mutating the property to your names.

You all legal heirs of your parents can jointly sell or anyone of you on behalf of other siblings through power of attorney ( Authorisation ) can sell but before  sell lroceedings you need to obtain heirship certificate .No need of mutation.