How can i put the cursor in the left using form.item?

Why when i used <Form.Item to wrap the input the cursor of him now is in the center, how can i put the cursor in the left?

<Form.Item label="Last Name">
                    <InputGroup >
                        <Input placeholder="Enter your last name" />
                    </InputGroup>
                </Form.Item>

But if i use only like this:

<Input placeholder="Enter your last name" />

the cursor is at the left