How To Write A Form Letter In Word . Under share, click get a link. Make the tone match the reason for the request. Letter Template In Microsoft Word business form letter template from www.businessformlettertemplate.com Go to the mailings tab, go to the start mail merge section, click on start mail merge , and slide down to step by step mail merge wizard. For a plain text control, it is ‘click or tap here to enter text.’. Click on the control and it will appear wherever your cursor was located.