Limited liability companies can claim deductions but not tax-exempt status. S-Corps can claim deductions but not tax-exempt status. C-Corporations are not tax-exempt entities Not only are donations to Non-Profits tax-exempt, but NPOs can themselves apply for tax-exempt status. Sole Proprietorships are the least official business entity and cannot claim tax exemption.
Where the equipment you use in your business was acquired as a gift, you may report your estimate of its current market value on the Business Property Statement (that is, what you think it would sell for in the open market place). Enter that estimated value in the most current year's cost line and add a note indicating that the entry is an estimate.