@philsmithgeologist let's begin with the more likely scenario and then see if it even matters.
If you lived in and owned your home for at least 2 of the 5 years prior to the sale date, then the first $250,000 of capital gains ($500,000 if filing JOINT) are excluded. So there is no capital gains tax.
is your capital gains estimated to be even higher than that? please post back the particulars. In most cases, the capital gains tax would be 15% of the gain over the exclusions noted above.
