Once you have completed the prologue you will be in Haven. The first thing you will have to do is go to the chantrey to speak with Cassandra and you'll form the inquisition.
Once this is done the area will open up. You should now have a quest to speak to people around town called Haven's best and brightest.
You now want to go out the front gate of haven and go left on the path where you'll see the blacksmith. If you're struggling to find him then open your quest map and it is the most north west diamond. Speak to Harritt and then use the table to make some armour or weapons. Ensure that you don't make an add on, for example boots, hilt or arms as they won't count. You need an item that will go in a slot, so any weapon is best (Thanks Elite). If you don't have the materials then there are a few in the haven zone as well as a couple of crates in the forge.
I believe if you then speak with the Smith again he'll give you an upgrade recipe which will let you do