Wonder if anyone can advise? I was asked to do some work to help out a friends new company, roughly 20 hours a week. All went well and I was asked if I wanted to become an employee which I was happy to do. This has taken a lot longer than I'd hoped and now it's not likely to happen till January. In the meantime I've carried on invoicing and getting paid. My question is I'm going to have earnt over £12,000 - what do I need to do about tax and national insurance? I've not worked for a long time and am very clueless - be gentle with me!!!!!!