When you volunteer for a recognized charitable organization or non-profit, you can enter your expenses for mileage, materials, supplies, etc., but never anything for your time or expertise or income you "could" have earned. You are volunteering for a public library---not sure if that will even meet the criteria to be considered volunteering for a charity.
https://ttlc.intuit.com/community/credits-and-deductions/help/what-is-a-qualified-charitable-organiz...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
