I'm not sure that there is one. It depends on the transaction and the life estate, which can take many forms and cover many things. Any beneficiary of a life estate has to pay taxes on what they...
The federal estate tax is paid by the estate of the decedent not by the individual beneficiaries. Of course, each share of the beneficiary will be reduced by the appropriate percentage of interest in...
If there is an estate, there are tax forms to be submitted. They may not result in any estate taxes, but they have to be filled out and sent in. That is one of the responsibilities of the executor.