My aunt rents a store at $700.00 per month in New Jersey. She operates this small store by herself. The store sells mainly prepared foods, candy and video rentals. She is currently collecting disability so does not file a personal tax return. The store is her only other means of income. Does she have to file income tax on the income collected from the store? She does keep any records, so does not know her profit at the end of each month. But, there is a profit. Also, she sells products, like prepared foods, that are taxed in New Jersey, but does not charge her customers tax. Must she include sales tax when she sells certain items? Thank you