Beeping when car started

O.k. so i’ve seen a thread like this before but i couldnt find it. At first it wasnt too annoying, but it’s starting to bother me more and more. Almost every time i start the car now it beeps at me. I beleive it’s telling me that one of my fuses is out. And I know for a fact that atleast a few actually are (since i havent had a rear defrost since i bought the car). Anyways my question is how do i diagnose whats wrong, and what is the part number of the fuse i need for rear defrost? I dont need defrost but i beleive thats why my car is beeping when it’s started.

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