Differences in tax laws and regulations lead to. Didi financing needs a one-year invoice, and the specific situation may be different due to differences in regional tax laws and regulations; According to the provisions of China's tax law, enterprises must keep invoices for a certain period of time after issuing them, and they need to declare and pay taxes to the tax authorities in time according to the regulations. Didi Chuji is an Internet company in China, which is committed to providing medical assistance and mutual insurance for patients. Founded on 20 14, it helps patients pay high medical expenses through crowdfunding.