Sudden peeing in the house

Hey, last night my dog wet on the sofa so we told him off and clean the chair, today I've put the cover back on and as soon as I did he went and peed on it again. The back door to the garden is open, i don't know why he has started doing this any ideas please

 

Hi Vicci, how old is your dog?

 

Also, what did you clean it with.