IRS publication 78 provides you with a list of organizations to which you can donate your money and then deduct the donation amount from your taxes. You may browse the database of all such charitable organizations and see, which ones have been removed there of late. This gives you a better idea on what donation amounts can be deducted from your tax.
However, presently IRS stopped publishing IRS publication 78. The database and the list still exist, but they should be found through typing in this name: Exempt Organizations Select Check. If you have any doubt concerning your donation and your ability to deduct it later on from your tax, you may directly contact the organization. Each organization, which can legally receive deductible donations are provided with IRS letters. These letters state that organizations are recognized as tax-exempts.
IRS has all the information on such organizations and this information can be gotten by calling a free line. If you are looking to make a deductible donation, you need to be make sure you donate it to the right organization. So, take your time to browse the database, check out IRS letters at the organization and call IRS to confirm the organization suits your purposes.