yes you can. You should get an email 1? week before they expire, where you have to answer some questions.
There are some requirements:
Your Dashboard Organization needs to be compliant, so all devices need to be licensed. The licensing also needs to be active and not expired. Compliant Organizations are those which have a CMNA promo license key applied, have 12 or fewer applied licenses and have active/current licensing. The program will not renew non-compliant Orgs, or those that are partially licensed or expired.
See https://trainingevangelism.zendesk.com/hc/en-us/articles/360014840598-CMNA-Refresh for full details