You will not know right away, unless you mail it as certified mail with a receipt and request proof that it was delivered. You have to wait 3-4 weeks and then you can start checking the status of your mailed return on the IRS website.
To track your Federal refund:
https://www.irs.gov/refunds
https://www.usps.com/taxes/welcome.htm
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
