The Forms Selection window for creating personalised letters allows you to create letters containing personalised information for selected people or companies. If you've installed MYOB OfficeLink (automatically included in typical installations) and you're using a compatible version of Microsoft Word, the letters will appear automatically in your word processing programme, where you can edit them, if you like, before printing them.
If you haven't installed OfficeLink or you don't have an OfficeLink-compatible word processing programme, you can create a mail-merge file that can be used with most word-processing software to create personalised letters.