Sharon's husband died in 2023. Everything was titled JTWROS so they did not file an estate tax return. When he died his tentative tax base was $1,011,696. What is the DSUEA deceased spouse unused exemption amount available for Sharon? Question 14 0/1 pts You have computed the tentative tax for Arthur and it is $6,478,765. Assuming the 2023 Estate tax rules for the unified credit and no other credits, what is the federal estate tax liability