Make sure you enter the duration of your notes so that they include the time for the initial note as well as any tied notes. Ties and tied notes are generated automatically by QuickScore Elite.
It is also possible to tie two or more notes together, providing they are the same pitch and follow one another immediately in time. To tie two or more notes together, control click the notes to be tied. From the submenu that appears, select Implicit or Explicit.
Ties can be implicit or explicit. Implicit ties will consolidate the notes to be tied into a single note with the combined duration of the notes being tied together starting at the same time as the first note. Explicit ties will explicitly tie the selected notes without consolidating them into a single note. Notes that are explicitly tied can be untied simply by moving them apart in pitch or in time.