It is the duty of the assessor to have printed, at the expense of the county, a sufficient number of assessment blank forms in the form furnished and prepared by the Department of Revenue; and, upon request of any taxpayer or state deputy tax assessor, the assessor shall furnish him with a copy or copies for the use of such taxpayer in listing his property for taxation. Said blank forms when filled out and returned to the tax assessor shall be known as the “tax return.” Upon demand of any person making a return of property for taxation, the assessor shall furnish him with a copy of such return.