Hi,
We have to only complete the forms which are updated on the SINP site.
saskimmigrationcanada.ca/international-skilled-worker
Kindly make sure that you complete only those forms which are applicable to your candidature and do mention "Not applicable" on places which you intend to leave blank.
I have personally attached the checklist document as it gives VO (Visa Officer) a complete understanding/Overview of my case and the concerned personnel would also find at ease in going through my file. Just try to put yourself in VO shoes and then you would understand the essence of the file.
Anyways its not mandatory so it's your choice. Also if you intend to upload the checklist file then carefully check mark the documents which you are going to attach.
Secondly the SINP-100-1 Skilled Workers Category application is not applicable under the International Skilled Workers category.
Regards,
Kane