TomTom has informed its customers that the older TomTom sat-nav models will no longer receive any new map updates. There are in total more than 60 models that are obsolete by TomTom. They will continue to work but the accuracy of navigation will not be perfect(because they access only older maps).
In case your tomtom device is not in this, you can update it with the help of the tomtom home app. For this, you need to connect your registered device with the system and explore the available free map updates for your device. Now, click on the install tab, and you have the updates.