Q: How should the occupation or type of business field be completed?
A: For item 9 - Record the occupation, profession, or type of business of the individual or entity recorded in Part I. Use specific descriptions such as doctor, carpenter, attorney, used car dealership, plumber, truck driver, hardware store, etc. Do not use non-descriptive items such as businessman, merchant, retailer, retired, or self-employed. If words like self-employed, unemployed, or retired are used, add the current or former profession if known (e.g. self-employed building contractor, retired teacher, or unemployed carpenter).
For Item 9a - NAICS Code: Enter the North American Industry Classification System (NAICS) code for the occupation or type of business entered in Item 9. Batch filers should only enter codes from the list of NAICS Codes authorized for use in the FinCEN CTR and located on the BSA E-Filing Web Site (http://bsaefiling.fincen.treas.gov/main.html) or from the NAICS list provided at https://www.census.gov/cgi-bin/sssd/naics/naicsrch?chart=2012 .
This is addressed in the "FinCEN Currency Transaction Report Electronic Filing Requirements" guide, Attachment C.