Well it would go on your 2022 return in 2023. So you wouldn't owe the tax until then. But you should consider sending in a quarterly estimated payment so you don't end up owing too much and to avoid any penalties if you owe too much. They want you to pay in evenly during the year. You have to figure out how much tax would be on the gain based on your total income for the year. You could even increase the withholding taken out at work to cover the extra tax.
