although I appreciate your integrity, the tax of catering service enterprises is calculated based on the total turnover, not the total profit. At present, the current business tax rate of catering industry is 5%, and the value-added tax rate of small-scale taxpayers has been uniformly adjusted to 3%. In the catering industry, on the contrary, the enterprises entrusted with management pay taxes more practically. Because it is necessary to list the accounts for investors to check, it is not good to understate the income or balance the accounts. In fact, you can also feel that it is easier to ask for invoices in these fast food chain stores than in some restaurants. Basically, you mentioned it and they printed it.
In addition, it is customary for everyone abroad to ask for invoices to offset income tax. So the merchant must show it.