Deductions & credits

Thank you so much for your response. 

There was no life estate, just my brother, myself, and my step mother and my dad on the deed. 

However, he was living in her home when he died. The home was just sitting there deteriorating. 

Nonetheless, it sold for $315000. 

My assumption is my brother and i have a cost basis from 1968, though he added us in 2013. we have added up all permanent upgrades to reduce the tax burden.