Its easy to upload a document to SureClinical. Typically you may receive an email asking you to upload a document. After you login to SureClinical with the mobile web client, just follow the instructions in the Tasks Dialog box that shows up after login.
If you want to manually upload a document manually, first select the 'menu' icon:
Then select 'Actions' and upload document. The wizard will walk you through the steps to upload your document to SureClinical.