Yes, Brock is correct in his response. There is no way to determine the amount of Tape Heads, there will always be 4. If you’d only like a single tap, you can turn the volume of Head 2-4 to 0.
The Feedback Path parameter determines which heads will be routed to the feedback path. For your single tap delay, you’d probably just want Head 1 in the feedback path. Any other setting will insert some of the other heads in the feedback path, even if the volume of the head is at 0.
The delay time of each head needs to be adjusted using the Head Div parameter to create multiple taps. If you’d like 2 Taps, you could set Head 1 to a 1/4 note, and Head 2 to a 1/2, and Head 3-4’s volume at 0, I think that would accomplish what you are looking for. Doubling up on the Tape Heads with slightly different values can create interesting variations.