Your current dose (mg) is 1.
The dose in one of your intact pills is probably 1 mg, so enter 1.
For the proposed taper duration, you probably want to try something like 365 days. If that rate is too slow, you'll have very few symptoms so you'll enter high values for how you're feeling which will cause the rate to increase a bit. For example, if you feel good enough to score 80-89 each day, the sheet will accelerate your taper to last just half a year. If you feel super good every day (90+), the sheet will accelerate your tapering period to just 4 months. If you're feeling just so-so, then a year (or more) is probably appropriate.
Then you just enter your start date, your method (Liquid or Dry), and either the weight of an intact pill (if you're a dry cutter) or the initial liquid volume that you'll use (if you're a liquid taperer).