I file a "C" form for each business I operate, etsy and my childcare. Under each there are category's for several deductions. Advertising covers a good portion of our "show business". But you can also receive 35 cents back on mileage, keep a year beginning and a year end for those miles.
IF you are filing the first time as a Indie crafts-person and you are unsure about the process H&R Block is very helpful.