As long as possible! Sometimes that's 2 or 3 weeks, sometimes it's just a few days, depending on when I received my products and how many time I have left. I received my Anua products 2 days before the deadline, needless to say I didn't get to test those for a very long time... 😉 I did send in my form to notify Picky of the late arrival, but I didn't wanted to wait much longer because you only get 7 days extra when receiving your products before the deadline (a bit longer if you receive them after the deadline) and my reviews were already dued for a few days when I published them 2 or 3 days ago. My delayed deadline was today.