You can add applicant information to documents by navigating to the document template editor and scrolling down to the "Applicant Details" section. The following merge tags are available for applicant information.
{{applicantFirstName}} = Applicant's First Name
{{applicantLastName}} = Applicant's Last Name
{{applicantEmail}} = Applicant's Email Address
{{applicantPhoneNo}} = Applicant's Phone Number
{{applicantStreet}} = Applicant's Street Address
{{applicantCity}} = Applicant's City
{{applicantState}} = Applicant's State
{{applicantZip}} = Applicant's Zip Code