There was guidance some time back to indicate only 1 Part 1 section A showing the individual's SSN and DOB but with DBA name and business address.
Yes. Originally, FinCEN issued a ruling in 2006 that required us to assume the fiction that the sole proprietor and the business were two separate persons, and two Section A entries had to be completed. Banks and service providers let out a hue and cry over that, but a lot of systems were rewritten to accommodate that rule. Then, in 2008, FinCEN replaced the 2006 ruling with a newer one that addressed not only sole proprietorships but also other DBA situations. They left the option open to continue handling things as the 2006 rule had required (so that the investment in software and procedural changes weren't lost), but also allow the use of a single Section A.
The most recent ruling is found
HERE.