Renewing Your Amateur Radio License thru FCC Universal Licensing System.
You may use FCC Form 605 to apply for renewal of your amateur operator/primary station license grant, including those station license grants within the grace period. Use purpose RO (Renew Only) for this. If it is necessary to also modify your name or mailing address shown on your amateur operator/primary station license grant, use purpose RM (Renew/Modify). If you are not requesting a call sign change, file the Main form only. (Club or military recreation stations need to file through a Club Station Call Sign Administrator. See the Public Notice on CSCSAs (text).)
You may receive a license expiration notification from an entity, but you are not required to use its services. File for renewal 30-60 days, but no more than 90 days, before your license expiration date. 47 CFR Section 97.21, provides that when your application for renewal has been received by the FCC on or before the license expiration date, your operating authority is continued until the final disposition of your application. If your license expires, you may apply for renewal of the license for another term during a two-year filing grace period. The application document must be received by the FCC on or before the end of the grace period. Unless and until the license is renewed, no amateur operator or station operating privileges are conferred. Applications received after the grace period has ended cannot be granted.