Most consultants receive 1099 forms because they work for multiple companies, while an in-house consultant would receive a W-2.
Answer: Independent contractors generally report their income on Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship). Also file Schedule SE (Form 1040), Self-Employment Tax if your net earnings from self-employment are $400 or more.
No, if you are an independent consultant or distributor for a direct sales or multi-level marketing company you are also required to report your income on Schedule C (Form 1040). As explained earlier, if you have net profits of at least $400 you'll also need to file Schedule SE.