Figure 2 Tax Forms Product ID Placement Figure 2 shows the header and footer area of a tax form with the product ID elements marked. In the header area in the upper left, “Form 1120” is user content identification. Below it, “Department of the Treasury Internal Revenue Service” Department and Agency are part of the official product ID. In the upper right, “OMB No. 1545-0,” the OMB number, is part of the official ID. Below it, “2020” revision is user content identification. In the bottom margin, “Cat. No. 14450Q Form 1120 (2020)” is the official product ID.