Problem extends beyond mailing forms. Everything linked to the tax year is now broken in this world. FSAs, employer-provided insurance, even general budgeting all have to change. Such changes will have an effect on the economy at the $100M scale, if not $1B. Why? Because the government couldn’t rent more server space? Buying a new data center would probably be cheaper than moving away from a single tax day. The proposed treatment is far worse than the disease.