Iowa Sales Tax Due Dates 2024. When completing your sales tax return, qualifying exempt sales are included on line 1, gross. Monthly sales tax due on october 21,.

Iowa has state sales tax of 6%, and allows local governments to collect a local option sales tax of up to 1%. Once you’ve successfully registered to collect iowa sales tax, you’ll need to apply the correct rate to all taxable sales, remit sales tax, file timely returns with the iowa.