how to create a form

[paul_aramis]

I need to create a report like the one in the attachment (FAI). rows from 14 to 34 are to be filled on FAI from Detailed BOM corresponding columns. some times we can have 100 parts/components for one FG (Finish Good). can the rows be added automatically if the number of components is over 21? also the minimum number of rows in central section of the form is 21.