What right do I have as a beneficiary to enter a property which I am partly responsible for the taxes, my sibling executor demands that I stay out ?

My (sibling executor) demands that I stay away from a property to which I am listed on the deed and responsible for 25% of the taxes due in a few months . The executor still after 18 months has not secured, repaired and insured the main asset . Executor basically has disregarded all the Texas probate laws to my knowledge. Also not being fair to all beneficiaries and mismanaged the estate funds and denying an accounting of the estate.