Tax Form The Gund Foundation’s 990-PF form is now available for viewing and downloading. Click here to visit Guidestar.org and sign in (for free) to access the tax form. The Form 990-PF is the IRS form filed annually by all private foundations and used by the IRS to determine if a private foundation is complying with the Internal Revenue Code and Tax Reform Acts. The 990-PF form lists foundation assets, receipts, expenditures, compensation of officers, and grants made during the year. (The letters "PF" stand for "Private Foundation.")