St 3 return

Dear Sir/Madam, Kindly Provide me a which notification to be updated for ST 3 Returns, And confirm me a sl number for the same, I have confused whether pick 26/2012, or 30/2012 ( we are service receiver) 1. Manpower Recruitment/Supply Man power Agency 2. GTA 3. Rent A cab 4. Works Contract Services 5. Other Taxable Services (Like Sitting Fees , Import of Services Etc ) 6. Legal Fees