4000service revenue
schedule c, line 1 (gross receipts)
4100product sales
schedule c, line 1 (gross receipts)
6000advertising
schedule c, line 8
6100vehicle fuel & expenses
schedule c, line 9
6200materials & supplies
schedule c, line 22
6300insurance
schedule c, line 15
6400office expense
schedule c, line 18
6500meals
schedule c, line 24b
6600subscriptions
schedule c, line 27a (other)
chart of accounts shaped to schedule c — every expense account maps to the line your cpa needs at year end.