1. Login to AiTrillion and head over to Formbuilder dashboard.
2. Click on Add a Form as shown below.
3. Choose the type of form you want to create. For this example I have chosen custom form.
4. Give your form a name and click next.
5. In the form elements section you will find the file upload field. Drag and top this field into the build area. You can then follow the instruction in this KB to complete your form settings.