It would be great to have the option of classifying an income item as capital gains, the same way we can classify them as dividends or tax-exempt. Additionally, once classified as Capital Gains, an option similar to “withhold x% for taxes” should be made available.

Use case: Private Equity carried interest income, which is taxed at LTCG rate and is perceived in a lump sum or over a certain period. People could use the “withhold x% for taxes” to model estimated tax payments throughout the years when this income takes place.