What form must be completed to appear before promotion boards?

The correct form to be completed for an individual to appear before promotion boards is the DA Form 3355. This form is specifically designed for documenting the recommendation for promotion, guiding the board's evaluation of the soldier's qualifications and readiness for the next rank. It serves as a formal application that outlines the soldier’s previous performance, achievements, and readiness for increased responsibility, providing essential information to the promotion board members.

Each of the other forms listed serves different purposes within military processes. For example, the DA Form 31 is used primarily for requests for leave, while the DA Form 3340 is associated with the request for a monthly pay advance or special pay. The DA Form 3300 is related to the Initial Counseling for soldiers coming into the Army. Therefore, while all these forms are valuable within their respective contexts, it is the DA Form 3355 that specifically fulfills the requirement for promotion board consideration.