I recieved a letter from HMRC about 2 days ago. They miscalculated my SEISS grant, it resulted in overpayment of a few hundred pounds. They are not going to activley seek to recoup the money, and it goes on to point out that it will all have to be declared on my next tax assesment (which i knew anyway) . I can't be the only one to get that letter, after all i done no calculating, they did ?