Form RD-108/108B is a tax return used by a sole proprietor, corporation, partnership, K-1 recipient or other fiduciary to file and pay the earnings tax of one percent due on net profits. Forms RD-108 and RD-108B are required to be filed even if there is a loss.
Below is a pdf from that you can use
http://kcmo.gov/wp-content/uploads/sites/12/2015/01/RD-108Rev.12-14.pdf