In the name of Allah, the most gracious, the ever merciful, peace and blessings be upon the messenger of Allah.
Salam Sister,
Taweez are not haram in general, at the time of the prophet(peace and blessings be upon him) people used to wear taweez, however, taweez is also used for doing black magic, these taweez have hidden shapes and things so that black magic takes places in a particular house or a place, you can see many youtube videos on these, the only haram taweez are the taweez based on shirk and kufr, which includes these taweez made for the purpose of black magic, a taweez should be checked properly,other than that, taweez are halal, but they should not be worn so that one could be succesful or something like that, it is Allah who will give blessings, not the taweez, it is just a way with which Allah gives blessins, for example, when we take medicine it not the medicine which cures us, it is rather Allah curing us, it is just a way by which he is curing us, just like that, taweez is also just a way. Here is the video I would use as a reference, it is in Urdu https://www.youtube.com/watch?v=oGYoHSxQge0