In the upper right hand corner of your screen, click on your name, and then select "Company Profile"
Once you click Edit, you'll be able to update all your critical company information, including purchasing code categories. Also, note the Certifications (for disadvantaged business classification) and Documents (W-9 and other important documents needed to become an official vendor with the agency) tab, which you should also ensure is up-to-date.
Clicking on "Categories" allows you to designate your company with a national classification system for government purchasing. Use the "Search Categories" box to find the codes that match the lines of business you belong to. If you have any question about which codes to choose, just click on the button in the lower right corner of the screen, and we'll be happy to assist you!