Some things to Bring...
Names of all household members
Social Security Numbers, Birth dates
Deductions and Credits
1098s from mortgage or school
Records of Expenses and Donations
Records of Medical Insurance premiums, medical expenses
Records of other taxes paid
A positive attitude and maybe some baked goods...
This is not an exhaustive list. If you need guidance on what to bring, just ask. We can give you a more extensive, personalized list.