You’ll want to include all of your training time in your volume calculations. The most helpful thing about TP is the fatigue metrics, and all training modes will contribute to fatigue.
If the prescribed volume doesn’t jive with the total volume of your current training, then maybe it’s too low?
You may also want to plan in shorter chunks, a year max. I find that training plans change almost immediately, and my general plan never resembles what actually happened. Multi-year goals make sense, but week to week plans that long in advance are too specific IMO.