'Do' and 'does' are both of those forms on the present indefinite tense in the verb 'to complete.' Which one you'll use will largely count on the sentence's issue. Their use is almost similar, apart from a person instance where You should utilize 'do' and never 'does.' And Sure, https://financefeeds.com/eu-council-and-parliament-agree-to-shorten-securities-settlement-cycle-to-t1/