For tax year 2020:

George and Nancy were husband and wife. At the time of George's death, they owned the following: land as tenants by the entirety worth $500,000 (purchased by George) and stock as equal tenants in common worth $30,000 (purchased by Nancy). George owned an insurance policy on his life (maturity value of $800,000) with Nancy as the designated beneficiary. George's will passes all his property to Nancy. How much marital deduction is allowed George's estate?