Explanation of Pa Inheritance Tax

Pa Inheritance Tax – Explanation of Process?

My sisters (who lived outside of pa) and I inherited a house, some cash from bank acct and Ira account from our mom ( pa resident). One of the sister was the executor of the estate who also has her name on my Mom’s Bank acct. We sold the house and have a gain. Now who is responsible to file Pa Inheritance Tax? The executor who live outside of pa? Or each beneficiary? How does each bene pays the inheritance tax ? Pls explain the process. Thank you.