Estimated tax alternative

[tomvzo]

I am a retired federal employee with invested savings. This year I had a lot of capitol gains, resulting in a high tax bill and a penalty. TurboTax is suggesting that I pay estimated taxes to prevent this from happening next year. Can I submit a form or somehow increase the amount that is withheld from my pension check each month? I'd rather do that instead of deal with quarterly estimated tax payments. Can I do this through TurboTax?

[SteamTrain · Accepted solution]

TTX Cannot do that for you, but if you have an OPM account, you can apparently arrange it online, or on the phone  (assuming it is being handled thru OPM):

See "How do I change my voluntary withholdings?"

  Retirement FAQs (opm.gov)