Judie
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work It usually takes 7-10 days for the form to arrive, you have a standard four week to complete and return the form which includes postage, there will be an accompanying letter that will detail a specific date for the form to be returned by, if you need it, then you can request a two week extension by contacting the number on the letter.
Gordon
