wr_1이 늘 문제네요

<label><input type="radio" name="price" value="wr_1"> 수입</label>
<label><input type="radio" name="price" value="wr_2" checked> 지출</label>

<input type="text" placeholder="수입을 입력해주세요!" class="inpBox" name="wr_1" id="wr_1" style="display:none">
<input type="text" placeholder="지출을 입력해주세요!" class="inpBox" name="wr_2" id="wr_2">

<script>
    $(function(){
        
        $(":input:radio[name=price]").click(function(){
            $(".inpBox").hide();
            $(".inpBox").val('');
            if($(":input:radio[name=price]:checked").val() == 'wr_1'){
                $("#wr_1").show();                
            }else{
                $("#wr_2").show();
            }
        });
    });
</script>