I have a pair or hearing aids that i donated, how do you figure a tax deduction on these.?

Answer 1

you must have a receipt for it, no matter how little they were worth
Tax Law Changes for Individuals

Restrictions on Charitable Contributions
Cash contributions. All cash contributions made in tax years beginning after August 17, 2006, to any qualified charity must be supported by a dated bank record or a dated receipt. The tax year for most individual taxpayers begins on January 1.

Clothing and household items. Beginning with contributions made after August 17, 2006, no deduction is allowed for most contributions of clothing and household items unless the donated property is in good used condition or better.

if you have a receipt, you can itemize on the 1040 long- but unless you have a lot of other deductions to itemize for, you make want to take the standard deduction.

Answer 2

Did you donate them to a 501(c)3 charitable organization? If not, you can't take a deduction.