Is this an analysis of only a tax plan, or a budget? See, a tax plan is only half the equation. It's actually significantly less than half the equation when it comes to debt reduction, as historically the amount of tax revenue as a percentage of GDP has stayed remarkable consistent regardless of tax rates. What is more important is (a) health of the economy (mo' money mo' tax revenue, and tax reductions would help the economy - by how much is debatable) and (b) reduced spending.
So to simply say "this tax plan adds ____ to the deficit" is pretty meaningless.
Granted, it is far easier for Republicans to propose "tax plans" for how much they are going to reduce taxes, than it is to propose detailed spending cuts.
Ideally, we should be slightly reducing and significantly simplifying our tax code, while cutting spending by about 5% per year for the next several years. That's just common sense and it really shouldn't be hard to achieve except for, you know, politicians in general and particularly Democrats.