If the label is difficult to cut or tape is jamming in the cutter, tape adhesive may have built up on the cutter blades after repeated use, taking the edge off the blades.  To solve this problem, follow the steps below.

First, try turning around the cutter board as shown in the illustration (1).

If you still have difficulties, replace with a new cutter unit (Accessory: TC-4) by obtaining from an authorised Brother reseller.
To replace the cutter unit, follow the steps below:

1. Pull out the two sections of the cutter unit (green) in the direction of the arrows shown in the illustration (2).
2. Install a new cutter unit. Push it in until it snaps into place.