my income will be significantly less in 2022, how can I calculate correct estimated taxes

My income will be significantly less in 2022 than 2021, due to a large capital gain in 2021.  But I am also self employed so I have to pay estimated taxes.  How can I adjust the estimated taxes to reflect the lower income in 2022?  It is giving me estimated taxes based on 2021 income/capital gain which will be way too high.