At my online harmonica school and for my personal tabs, I use an enhanced type of document that I designed to quickly write musical notations, providing most of the information useful for the performance, and indicating both the names of the notes and the holes of the harmonica to play.
Reading the note names is essential to learn how to improvise and transcribe the music we listen to; it is only when we know exactly where each note on the instrument is located, that we can master the harmonica.
With these types of tabs, the musical measures are divided into 4 beats, and within each beat, you can also have a subdivision into eight notes, sixteenths, as well as triplets and other combinations. Some symbols indicate continuing the note you are playing and others how to perform the note, for example, with tremolo, vibrato, or some tongue-blocking articulations.
HAVE A LOOK AT THE VIDEO THAT SHOWS YOU HOW TO READ OUR SCHOOL HARMONICA TABS.
Here you'll find a detailed description of the lesson methodology and how to use the school videos.