What happens if I don't file a 1099 for my subcontractors?

I didn't realize that you had to fill out the 1099 form before starting a new return until today - 4 days before taxes are due so, late for the January 31 deadline. What happens if I don't file a 1099? In years past, I have subcontracted for other companies and have never received a 1099 from them.