1. tax accounting: tax accounting is required for the high-opening amount to ensure that the company's tax declaration and payment comply with the provisions of the tax law. Expense bill is an important basis for tax accounting, which can prove that the amount of high opening has actually occurred and been paid.
2. Internal control: A pharmaceutical company needs to establish a perfect internal control system to ensure the company's financial security and compliance. Expense bills are an important part of internal control, which can prove that the company's expenses are true and compliant and conform to the company's internal regulations.