How do I deduct expenses for volunteering for a charity?

According to Publication 526, out-of-pocket expenses are entered on line 11 of Schedule A as an itemized deduction to your charity. 

To complete this within the program, go to:

1. Federal
2. Deductions - Select my forms
3. Itemized Deductions
4. Gifts to Charity 
5. Cash Gifts to Charity