What is an unlimited deduction pertaining is an estate?
There are essentially only two deductions associated with estate and gift taxes for which we need to be aware of—the marital deduction and the charitable deduction. Taking a deduction from an estate value (e.g., to reduce the estate value for tax purposes) is not the same as using the unified credit against the tax itself, as pointed out above, but the ultimate desired result of transfer tax reduction or elimination is the same.
