What portion of my conversion to a Roth IRA is taxable and non-taxable?

The taxable portion of the conversion is the portion required to be included in gross income because of the conversion. Usually the entire amount is taxable unless converted from an account that had a basis. For example, if you made non-deductible contributions to a traditional IRA that you later converted to a Roth IRA you may have a non-taxable portion of the conversion.

You can find the taxable portion of the conversion on Form 8606, Line 18 and the non-taxable portion on Form 8606, Line 17 of the tax year you did the conversion.