Do tax office contact always to other tax office if anybody suspicious or not pay a tax?
Yes, they do! I’ve seen your other questions about your tax. You need to speak to the tax office. Tell them you made a mistake and you do/did work for your employer, but he hasn’t given you a P60 and now you’re really worried about it. They can’t help you if you don’t tell them the truth. A lot of workers from other countries are treated badly by UK employers who think they will get away with it.