Click on this Microsoft documentation to add filter controls to a simple list form in AX2012 : https://docs.microsoft.com/en-us/dynamicsax-2012/developer/how-to-add-filter-controls-to-a-simple-list-form
AX – D365FO – How to: Add Filter Controls to a Simple List Form in Ax2012
AX / Dynamics 365 For Finance and Operations blog 