The Elder Scrolls V: Skyrim Special Edition Tips

How to get Daedric arrows
Go to Solitude and you see the blacksmith go to the store to the left of him and you notice its a Fletcher. Go in shop for some arrows and you see he will have some Daedric arrows they are expensive, about 24 gold each. You can only aqquire these at this shop at level 23 and above.

Another way is to join the thieves guild in Riften. And do the quests there and then eventually you come across a women named Karliah. When you have the chance to pick pocket her. You see she has over 20 Daedric arrows.