When it comes to income tax returns, April 15  isn’t the only deadline taxpayers need to think about. The federal income tax filing deadline for calendar-year partnerships, S corporations, and limited liability companies (LLCs) treated as partnerships or S corporations for tax purposes is March 15. Why the deadline change? One of the primary reasons for moving up the partnership filing deadline was to make it easier for owners to file their personal returns by the April filing deadline. After […]