A Stocks and Shares ISA can be a good way to build long-term wealth. That may come in the form of share prices moving upwards. But dividends can also be a source of income along the way. In fact, owning an ISA stuffed full of dividend shares can be a lucrative source of passive income. If I had a £20K Stocks and Shares ISA and wanted to target £1,980 in dividends annually, here is how I would go about it. At first glance, the maths may seem simple. Financial services company Phoenix offers a dividend yield of 10.2% for example. So putting my £20K ISA into Phoenix ought to earn me over £2,000 in dividends annually. The problem with that approach is that it concentrates my risk. Just because Phoenix has been growing its dividend in recent years does not mean it will maintain it in future. Vodafone had a dividend yield even higher than Phoenix’s until recently but a planned reduction means the prospective yield is far lower than before. No dividend is ever guaranteed. With £20K, I would therefore invest my Stocks and Shares ISA across five to 10 different companies. Imagine instead that I set my sights...