It is my understanding that inherited property has an acquisition value at the time of passing of the last owner, which would be your mother as the prime trustee of the family trust. You should have had the house appraised soon after she passed. Any taxes would be due on the appreciation of the property since she passed, which appears to be zero or negative. You and your siblings do not owe taxes on the total value of the house. I do not know about Maryland tax code.
