I just ran across this error as well (at least, it appears to be an error to me). @Lanikai200 -- I assume you've figured this out by now, but it looks like for column (b), Turbotax incorrectly treats the period as 6 months (through the end of June), not 5 (through the end of May). And 90% * 6/12 months = 45%. Similarly, for column (c), they use 9 months instead of 8 -- 90% * 9/12 months = 67.5%. Unfortunately, the latest updates, as of April 2, don't include a fix for this.
Note that the Annualization Amounts for columns (a) through (d) are 4, 2.4, 1.5, and 1, respectively (i.e. 12/3 months, 12/5 months, 12/8 months, and 12/12 months); the Applicable Percentages should be the inverse of those (then multiplied by 90%).
