I need advise of some stock I want to sell.

[phrmlr]

I do not want to owe taxes the end of the year.

[re2boys]

And your tax question is??????
What is your expected gain on the stock sale and did you own it for more than a year?
What is total of all your other income for 2017?

[rjs]

Whether you have to pay any tax for selling the stock depends on the answers to the questions that re2boys asked you.

[TomYoung · Accepted solution]

In any case, you seem to be letting the Tax Tail wag the Investment Dog, which is foolish.

If you've got a profit in the stock and if you think the stock is going to fall out of bed in the near future, you sell your investment and - maybe - share some of that profit with the IRS.  (Long term gains are taxed at very favorable rates, starting a 0% for some, taxed at only 15% for most.)  And you laugh all the way to the bank.

Not selling a stock because you don't want to pay taxes on the gain and then watching those profits disappear as the share price plummets is just plain silly.

Tom Young

[SweetieJean]

Well put, Tom.
Just remember state taxes as well.

[fanfare]

Unfortunately, watching profits evaporate is the lot of many investors.
Noone can predict the top or the bottom. And no bell rings to announce it.

[fanfare]

Pay now, or pay later.
Estimated tax payment in 2017, or final tax due April 15, 2018

Strictly speaking, IRS expects you to make that Estimated Tax payment.