The SBIR and STTR programs are solicited programs. That means that the government requests support of specific needs. You must identify a solicitation or area of interest to which you will respond with a proposal. Each year the federal agencies participating in the SBIR / STTR programs issue program solicitations describing the technical areas for which they are interested. The solicitations, their release and due dates, and submission instructions are available at each agency website www.sbir.gov. These last two sites have search engines that search the text of all solicitations on the web for key words that you enter into a search box. This allows you to quickly identify solicitations that are a match with your technology or idea.