It is a normal question but not something you have to answer. I've not been offered a job because I did not discuss my previous salary with the new company acc

It is a normal question but not something you have to answer. I've not been offered a job because I did not discuss my previous salary with the new company according to someone that knew. I'll put zero down if it is a required field. If it is in an interview, I'll deflect. If the company wants to offer me a job then we can negotiate at that point. And most likely my new job isn't going to be the exact same as any previous position.