Help! After tax return- Why sometimes it adjust for capital gains, sometimes not?

Hi all,

I came across some questions where it calculates after tax return but it does not adjust for capital tax gain or income tax or anything, and no tax exempt account. This is quite important for the exam and I cannot figure why…

Example - q17 on mock 2017PM-sunnydale, the super long vignette. After tax return- it just takes before tax- no adjustment for taxes.

any ideas?

Thanks,