It depends on how long you owned and lived in the home before the sale and how much profit you made. If you owned and lived in the place for two of the five years before the sale, then up to $250,000 of profit is tax-free.

If you are married and file a joint return, the tax-free amount doubles to $500,000. The law lets you "exclude" this much otherwise taxable profit from your taxable income. (If you sold for a loss, though, you can't take a deduction for that loss.)

  up to $250,000 of profit is tax-free

If your profit isn't 6 figures, choose this option carefully.

Are you referring to the over-55-once-in-a-lifetime exemption that was replaced in 1997 with the introduction of the Taxpayer Relief Act? https://en.wikipedia.org/wiki/Taxpayer_Relief_Act_of_1997

Homes are heavily taxes if you don't live in them, to the above poster's point.

Property taxes also apply to home ownership.

Regarding property tax, yes, but dividends are taxed as well and you generally are going to pay capital gains in the specific situation I’m describing if you replace “primary residence” with “stock”. Primary residences with mortgages have better tax treatment, really. If it didn’t I wouldn’t have a mortgage.

Until this year, you could deduct those taxes up to your total federal tax liability (which may be what the parent is saying), but now you're limited to $10,000. Either way, it's a lot more burdensome than most investments.