If it has been 4 weeks and there hasn't been any additional activity on the website, I would call and verify that they have indeed received everything and that no additional information is required from you at this time. They may be able to access your account and provide you with updates that are not available on the website.
Contact information for the Indiana Department of Revenue can be found at the link below:
https://www.in.gov/dor/3325.htm
