If you were paid, that is taxable income. Did you get a 1099-MISC from the organization? Did you report the income on your federal and state return?
If you made a donation, whether paid or unpaid, you are not allowed to claim a deduction for a charitable contribution for the value of your plasma, due to certain IRS rulings that I can explain if needed. You also can't take a deduction for medical expenses.
Is the state asking about a deduction you claimed, or income you failed to report?