Tappit cutters whether they are numbers, letters or other shapes can be tricky to use. This video will show you how to use tappit cutters. It is pretty simple and it needs only a bit of practice. I recommend to use fondant/sugar paste that is not too soft (take a piece of fondant and leave it out for a day or at least a few hours – this should help. However, if you live in a very hot country, you may need to find another way. Also use icing sugar or corn flour if the fondant is too sticky).
Watch the video for this tutorial: