An organization that is not required to file a full IRS 990 return must file a Pennsylvania Public Disclosure Form BCO-23. This application should be filed within the first 15 months of your organization's existence.Other types of nonprofits apply using Form 1024. Cost, time, and paperwork required to start a nonprofit. Learn how to start a nonprofit in Pennsylvania with our free step-by-step guide. There are a number of tasks involved with forming a nonprofit organization at the state level. The most important of these is the incorporation process. Filing a plan of dissolution notifies the state of incorporation of the organization's plans to dissolve. Other types of nonprofits apply using Form 1024. Request (listing as a section 501(c)(3) organization on IRS.