Complete Form ET-141 if it is claimed that the decedent was not domiciled in New York State at the time of death. How do I fill this out?To fill out the New York Estate Tax Domicile Affidavit, gather all necessary personal information about the decedent. How Do I Fill Out an Affidavit of Domicile? Required Information. Before you begin filling out your form, you need to have the following information on hand: The decedent's full name and date of death. RULE 2106: Affirmation of truth of statement. Use our affidavit of domicile form to verify the last home address of a deceased person to speed up the inheritance process. To create an Affidavit of Domicile, you need to provide accurate information about the decedent and the party who will take ownership of the assets in question.