M
Welcome to the forum
In case you are not aware, your real name appears to be showing in the forum, if you want to change this then follow the instructions in the following FAQ
My full name is showing, how can I stop it?
You don't say what benefit you are asking about, but if you do not return a re-assessment form on time you should receive a follow up letter asking you about it.
You can always ask the DWP whether you are being re-assessed.
Gordon