From the Web:
Tip #1 - Taceting or the Art of Zero

Laying low is one thing, but laying out is another. Two reasons for laying out or taceting;

1. If a tune or section of a tune is too difficult to play at this point in time, it's probably better to stop playing and leave it to the players who can cover the song or section rather than struggle through and distract the congregation from worship with your "clams", (musicianese for missed notes). If you're not a good enough player to play the part yet or you just didn't have time to practice it at rehearsal or at home laying out is the noble thing to do.

2. A second reason to tacet would be for dynamics. A mellow section or the first verse and chorus of a song might just work better if you tacet and come in later. This makes the point of entry more dramatic and thus more dynamic. A tacet may be written into the chart by stating "guitar in" over bar 21 for example. That's an arrangers trick to creating a crescendo (increase in volume). Layering the instrumentation, adding or subtracting with each verse and/or chorus, to increase or decrease the volume. Enough said. This seems like the easiest posible part, but timing is everything. You don't want to lay out at the wrong moment. Experience will help guide you in the lost art of taceting. A wise man once said, "it's not the notes you play but the notes you don't play."

So no, you won't find any Tacet chords with this program!