Charlie's Green Lawn Cares is a cash basis taxpayer. Charlie Adame, the sole proprietor, is considering delaying some of his December 2019 customer billings for lawn care into the next year. In addition, he is thinking about paying of the bills in late December 2019, which he would ordinarily pay in January 2020. This way, Charlie claims, he will have "less income and more expenses, thereby paying less tax!" Is Charlie's way of thinking acceptable?