Tie into Volta 2

For Musescore 4.5.x, this should work more or less automatically: if you entered all notes before the tie, you can just select the initial note and press 'T', and it will tie into both voltas. If first you entered the notes including the tie, into the first volta, and then the note in the second volta: click the tie into the first volta and select the correct destinations in the popup menu.

Playback does not yet work. (I believe it is scheduled for 4.5.2).

For earlier versions of Musescore, there are workarounds.