1065 & 1120-S Deadlines 2026: IRS Mailing Rule, Penalties and Extensions

Tax professional dressed as a USPS mail carrier explaining the IRS mailing rule showing March 16 deadline and the concept “Timely Mailing Equals Timely Filing” for business tax returns.

IRS Penalty Relief 2026 | Guide for Forms 1065 & 1120-S The March 16th deadline has passed. Request penalty relief now to protect your business. El plazo del 16 de marzo ha vencido. Solicite el alivio de multas ahora para proteger su negocio. EN ES ☀️ Action Required Missed the Deadline? How to Request IRS […]

1065 & 1120-S Deadlines 2026: Penalties, Extensions and S-Corp Strategy

Strategic Playbook 2026: Deadlines, Profit First & S-Corp Simulator EN ES ☀️ Tax Season 2026 Strategic Playbook: Deadlines & Entity Optimization Master your 1065/1120-S filings, implement Profit First, and discover if an S-Corp is the right move for your revenue. Final Deadline 03/16/26 March 15 is Sunday; moves to Monday. Late Penalty $255/mo Per partner […]