“C corporation” generally refers to the default federal corporate tax treatment, while an S corporation is an eligible corporation or other eligible entity that has made an S election. S corporations have shareholder and other eligibility restrictions that C corporations generally do not.

An S corporation should be explained as a federal tax classification rather than simply another state entity type. A qualifying corporation or LLC can seek S corporation tax treatment by making the required federal election. The entity must satisfy eligibility rules, and the underlying state-law entity continues to exist as the corporation or LLC that was formed with the state.

A C corporation is generally the default federal tax treatment for a corporation unless a valid alternative election applies. Swyft Filings' corporation service focuses on the state formation step, including preparation and submission of the incorporation filing. Internal corporate records, stock issuance, tax filings, and ongoing state reports are separate responsibilities that follow formation.