Software used for Non-Profit

Assuming this IS able to be deducted...I have 2 non-reimbursed software subscriptions that I use 100% for research when donating my time to a non-profit organization. How can I deduct the cost of the subscriptions (about $560 total)? Right now I have them under charitable donations, listing the organization and it's EIN, categorized as "other personal property", and a value method of "present value." This is the first time I've used this deduction even though I volunteered last year. I am not quite sure it's the correct way to do it and don't want to cause an issue with my return. It won't change my refund on the Fed return but I think it impacts the State return (AZ).