1. First confirm the invoice information, and confirm the specific requirements and information of the invoice with the work clothes supplier, including the company name, taxpayer identification number, address and telephone number.

2. Secondly, prepare materials, such as purchase contracts, orders, receipts, etc. These documents will be used as the basis for issuing invoices.

3. Then contact the supplier, contact the work clothes supplier, provide the materials that need to be invoiced, explain that the invoice type is ordinary invoice, and provide the proof of purchasing work clothes for the supplier to verify.

4. Then issue an invoice, and the work clothes supplier will issue an invoice according to the information and vouchers provided and the procedures and requirements stipulated in the tax law. Including the title of the invoice, taxpayer identification number, address, telephone number, billing date, commodity or service name, amount, tax rate, tax amount, etc.

5. Finally, check the invoice. After receiving the invoice, be sure to check whether the contents of the invoice are consistent with the actual situation of purchasing work clothes, such as the amount and quantity.