In order to allow users to be able to see, edit and enter records on your workflow forms, you will need to ensure that they have been given permissions to the relevant form.
Note that to set this you will need access to the workflow forms designer application:
Open Workflow Forms Designer and log into the relevant database
Select the relevant form in the list
Select the Permissions button
Locate the user in the list and set relevant permissions the user needs for the form
Once completed, select the Save button