If you started or acquired this business in 2010, check the box on line H. Also check the box if you are reopening or restarting this business after temporarily closing it, and you did not file a 2009 Schedule C or C-EZ for this business.

Except as otherwise provided in the Internal Revenue Code, gross income includes income from whatever source derived. In certain circumstances, however, gross income does not include extraterritorial income that is qualifying foreign trade income. Use Form 8873 to figure the extraterritorial income exclusion. Report it on Schedule C as explained in the Instructions for Form 8873.

If you were a debtor in a chapter 11 bankruptcy case during 2010, see Chapter 11 Bankruptcy Cases under Income in the instructions for Form 1040 and page SE-2 of the instructions for Schedule SE (Form 1040).

Enter gross receipts from your trade or business. Include amounts you received in your trade or business that were properly shown on Forms 1099-MISC. If the total amounts that were reported in box 7 of Forms 1099-MISC are more than the total you are reporting on line 1, attach a statement explaining the difference.

If you received a Form W-2 and the Statutory employee box in box 13 of that form was checked, report your income and expenses related to that income on Schedule C or C-EZ. Enter your statutory employee income from box 1 of Form W-2 on line 1 of Schedule C or C-EZ and check the box on that line. Social security and Medicare tax should have been withheld from your earnings; as a result, you do not owe self-employment tax on these earnings. Statutory employees include full-time life insurance agents, certain agent or commission drivers and traveling salespersons, and certain homeworkers.

If you had both self-employment income and statutory employee income, you must file two Schedules C. You cannot use Schedule C-EZ or combine these amounts on a single Schedule C.

See the instructions under Rental real estate business on page C-2.

Generally, the installment method cannot be used to report income from the sale of (a) personal property regularly sold under the installment method, or (b) real property held for resale to customers. But the installment method can be used to report income from sales of certain residential lots and timeshares if you elect to pay interest on the tax due on that income after the year of sale. See section 453(l)(2)(B) for details. If you make this election, include the interest in the total on Form 1040, line 60. Also, enter 453(l)(3) and the amount of the interest on the dotted line to the left of line 60.

If you use the installment method, attach a schedule to your return. Show separately for 2010 and the 3 preceding years: gross sales, cost of goods sold, gross profit, percentage of gross profit to gross sales, amounts collected, and gross profit on amounts collected.

Report on line 6 amounts from finance reserve income, scrap sales, bad debts you recovered, interest (such as on notes and accounts receivable), state gasoline or fuel tax refunds you received in 2010, credit for biodiesel and renewable diesel fuels claimed on line 8 of Form 8864, credit for alcohol and cellulosic biofuel fuels claimed on line 7 of Form 6478, credit for federal tax paid on fuels claimed on your 2009 Form 1040, prizes and awards related to your trade or business, and other kinds of miscellaneous business income. Include amounts you received in your trade or business as shown on Form 1099-PATR. Also, include any recapture of the deduction for clean-fuel vehicles and clean-fuel vehicle refueling property used in your business. See Regulations section 1.179A-1 for details.

If the business use percentage of any listed property (defined in the instructions for line 13) dropped to 50% or less in 2010, report on this line any recapture of excess depreciation, including any section 179 expense deduction. Use Part IV of Form 4797 to figure the recapture. Also, if the business use percentage drops to 50% or less on leased listed property (other than a vehicle), include on this line any inclusion amount. See chapter 5 of Pub. 946 to figure the amount.