Is K1 Deadline March 15 2024 Or April 15 2024. For 2024, llcs filing as an s corporation must file form 1120s by march 15 without an extension. File 2023 tax return and pay tax due:
Partnerships and s corporations reporting on a calendar year basis, which most do, must file their 2023 income tax returns by march 15, 2024. However, the exceptions for tax day are: