This is an alert for any calendar year non profit Genealogical Society, your for 990 is due May 15. I will guess most genealogical societies will use the form 990-N or 990 postcard form. The 990-N is for societies with less than $50,000 a year income.  Go to www.irs.gov and search for the 990-N form. It must be filed online right there. Takes about 10 minutes to file and get the conformation that it was accepted. They ask 2 questions, did you take in less than $50,000 last year and are you still active. Then they want the name and address of an officer  and you are done.