How to Make Mailing Labels from Excel 2019 | Pluralsight 2. Next, open up Word and click on the Mailing tab at the top. 3. Click on Start Mail Merge, then select Step-by-Step Mail Merge Wizard. 4. Click Change document layout, then Label options. 5. Choose OnlineLabels.com from the second dropdown list to find your correct product number (For example, Avery US Letter ).