We both had letters last year and previous years. This year I got a letter just this past week. I now get the full £500 myself since DH died.
I have just done self- assessment for HMRC online and discovered I can also access full details of all my pensions and how each one is taxed, how much, tax codes etc, also NI history. Some of this information is newly accessible this year.
The one thing I can’t access information about ( except via the French website) is my tiny French pension, which is the reason I have to do self- assessment. France sends me an annual total but it is no use as it is in euros, and also their tax year is a calendar year.
Because I do SA I also have to add up all my savings interest and declare it. Some banks make this information easy to access, but with others it is hard work. If you don’t do SA, you don’t have to do this, as the banks inform HMRC. I am always worried that I might have missed something. Sorry to digress..