What to do with GA state tax with unexpected short-term capital gain tax in 2021?

[TC3303]

My husband and I both have W-2 jobs. In Nov.2021, we made a large amount of short-term capital gain with our stocks, so we probably own much more tax than the 2021 GA state tax withholding through W-2 jobs. What should we do with it? Is there a deadline to make up for what we own?

[Bsch4477]

You have to pay your tax liability by April 18. 

[TC3303]

Is there similar penalty as the federal tax that if we own too much we will have to take?

[MinhT1]

Yes, Georgia has a penalty for underpayment of estimated taxes, which equal to 9% per year of the underpayment amount.

Please read this Georgia Revenue document for more information.