Start the Mail Merge Wizard and then complete Step 1 by selecting the current document as the starting document. In word
, you can start the Mail Merge Wizard by clicking on the "Mailings" tab in the menu bar, and then selecting "Start Mail Merge" and "Step-by-Step Mail Merge Wizard".
Once the Mail Merge Wizard is open, you will be prompted to select the type of document you want to create. In this case, you should choose "Letters" if you are creating a letter document.
Next, in Step 1 of the Mail Merge Wizard, select "Use the current document" as the starting document. This means that you will be using the existing document to create the new merged document.
After completing Step 1, you can move on to the next steps of the Mail Merge Wizard to select recipients, customize the letter, and complete the merge process.