Massachusetts Affidavit Regarding Federal Estate Taxes is a legal document used in the state of Massachusetts to certify that the estate of a deceased person is not subject to federal estate taxes. There are two types of Massachusetts Affidavit Regarding Federal Estate Taxes: the Short Form Affidavit and the Long Form Affidavit. The Short Form Affidavit is used when the estate is not subject to federal estate tax due to the applicable exclusion amount, or if the estate's gross value is below the federal estate tax threshold. The Long Form Affidavit is required for estates with a gross value greater than the federal estate tax threshold. This form requires the estate executor to provide detailed information about the estate, such as the names of heirs or beneficiaries, the values of each asset, and other relevant financial information. Both forms must be signed by the estate executor and a qualified witness, such as an attorney or a notary public. The completed affidavit must be filed with the Massachusetts Department of Revenue within nine months of the date of death.