While spring cleaning, Ramon found an entire box of unreported receipts for his sole proprietor business. Ramon wants to amend his return to claim these business deductions. Which form(s) and/or schedule(s) does he need to send to the IRS to amend the return?

Form 1040X.

Form 1040X and a copy of his original return.

Form 1040X, Schedule C, and any other forms or schedules affected by the change in his income.

Form 1040X, Schedule C, and a copy of each receipt left off the original return