Can I change ownership percentage

Can IRS allow to change the ownership %,  I have the rental property divide 4 . The parent get 50%, first son get 25%, 2nd son get 25% for 30 years of taxes filling. Now a father died can we change the ownership give to the first son take care the property to 50%.  The parent get 25%, first son get 50% and 2nd son get 25% of ownership rental house. Thanks