Service is first come, first serve. Signups begin at 9:30 AM and the last return is begun at 1:00pm.
You must bring all necessary documents for service: valid photo ID, previous year's tax return (If necessary, contact the IRS for a copy of last year's return),
Social Security numbers for all dependents, W-2 forms from each employer, all 1099 forms (1099-INT, 1099-DIV, 1099-misc., etc.) showing interest and/or dividends as well as documentation showing the original purchase price of your sold assets.
If you were paid Social Security benefits, bring your SSA-1099.