Column Tax, Inc. is a B2B financial technology company that provides an API (Application Programming Interface) enabling developers to integrate income tax-related services directly into their own platforms. Founded by a team with experience from Cash App, the company's mission is to build the infrastructure that makes taxes accessible and automated for everyone. Their core products allow other businesses, such as neobanks and fintech apps, to offer services like tax filing, tax withholding, and IRA tax reporting to their end-users without building the complex tax infrastructure themselves.