The IRS requires all 501(c)(3)s to file an annual information return. This will give the IRS a snapshot of what your Neighborhood Association has done in the past year. This annual information proves to the IRS that your Neighborhood Association is staying in 501(c)(3) compliance.
This annual information return - Form 990-N (or the Form 990-EZ if gross receipts are less than $50,000) - is due by May 15th each year.