1, immediately contact relevant institutions or departments, explain the situation and ask for supplements.
2. If you have missed the submission time, you can ask the relevant institutions or departments whether you can submit the delayed form.
3. If the form has a specific format or requirements, you can try to re-create the form and submit it according to the specified time and format.
4. If the above measures are not feasible, you can consult the relevant institutions or departments for other alternatives or remedial measures.