A tax imposed on the privilege of receiving property by inheritance or legal succession and assessed on the value of the property received is called..?

Tax on the Property transferred on Death is IHT ( inheritance Tax ) the value taken for this purpose is the market value at the time of death.  the Value is also called Probate Value.

Inheritance tax.

Which I think is wrong because that guy has already paid tax on this property all his life. They can have an annual tax for that property as it is used to, but not for inheriting a property for which the tax has already been paid for.

Inheritance tax is a tax imposed on the privilege of receiving property by inheritance or legal succession and assessed on the value of the property received