Iowa Administrative Code Title 701 — Department of Revenue
Iowa Admin. Code r. 701—204.3(423) — Requirement of uniformity in the filing of returns and remittance of funds
Any model 1, 2, or 3 seller may submit its sales or use tax returns in a simplified format that does not include more data fields than permitted by the governing board. The department will require only one remittance for each return except as otherwise allowed by the agreement. If any additional remittance is required, it will only be required from sellers that have collected more than $30,000 in sales and use taxes in Iowa during the preceding calendar year. The amount of the additional remittance shall be determined through a calculation method rather than actual collections and shall not require the filing of an additional return.
Source: official text