Iowa Admin. Code r. 701-78.3
Returns must be made by taxpayers on forms supplied by the department. Taxpayers not supplied with the proper forms shall make application for proper forms to the department in ample time to have the taxpayers' returns made, verified and filed on or before the due date. Each taxpayer shall carefully prepare the taxpayer's return so as to fully and clearly set forth the data required. All information shall be supplied and each direction complied with in the same manner as if the forms were embodied in these rules.
Failure to receive the proper forms does not relieve the taxpayer from the obligation of making the replacement tax return.
Returns received which are not completed, but merely state "see schedule attached," "no tax due," or some other conclusionary statement are not considered to be properly filed returns and may be returned to the taxpayer for proper completion. This may result in the imposition of penalties and interest due to the return's being filed after the due date.
Iowa Admin. Code r. 701-78.3