TypeError: Cannot read properties of undefined (reading ‘id’) (javascript)

when i run this code it gives me error Cannot read properties of undefined (reading ‘id’) what’s the problem in my code?

tasklist=[{"id": 58,"taskName": "task-1","lists": []}]

const createItem = () => {
    const itemName = document.getElementById("itemName").value;
    const taskId = document.getElementById("task-id").value;
    let itemObj;
    tasklist.filter((object) => {
        if (object.id === taskId) {
            console.log("true");
            itemObj = {
                id: Math.floor(Math.random() * 100),
                itemName: itemName,
                done: false,
            };
            object.lists.push(itemObj);
        }
        return object;
    });
    displayItem(taskId, itemObj.id);
};