Help with automated doc generation expression


I am trying to generate an invoice and would like to generate a statement using the columns below. I’ve tried a number of different versions of this but I cannot seem to get it right and get the error listed below. Can anyone see where my mistake is and assist?

<<CONCATENATE(<<[Store Name]>>,”-”,<<[What month is this turnover declaration for?]>>,” “,<<[Year]>>)>>

Error 1 : ‘Handle updated Turnover Declarations record’ task ‘Send an invoice via email’ Attachment template. Contains expression ‘<<CONCATENATE(“<<[Store Name]>>’ having a start token ‘<<’ without a matching end token ‘>>’

You got too many angle brackets. You only need a single opening and closing angle bracket pair for every expression.