You can’t deduct the value of your services, but you should be able to deduct whatever out-of-pocket costs you incur. Such costs must be:
- directly connected to your services
- incurred only because of the services you provided, and
- not personal living or family expenses.
Your volunteer work must be on behalf of a qualified (i.e.-tax exempt) charity. And your expenses can include travel by air, car, rail or bus. Not to mention meals and lodging. See IRS Publication 526 for more details.