You need to contact the state CNA registry online or through the US Mail. You can also renew online.
We've even left you the link at the bottom of the page. You will need to provide notarized documentation of having worked a minimum of 8 hours as a CNA in the last 24 months.
Your license is valid for 24 months from the date that your last license was issued. If you should happen to become inactive (24 months without official employment as a CNA), you will need to retake the certification test.
The fee to renew your CNA license is $40.00 as long as you are listed as active (you have provided your proof of CNA employment) on the state CNA Registry.