This is something that the Indian government has done quite well. Although the website has had some growing pains (68 million filings is apparently not that eas

This is something that the Indian government has done quite well. Although the website has had some growing pains (68 million filings is apparently not that easy to scale to) it is getting better and works exactly as you described. It even looks quite modern and not at all like a typical government website. Moreover they also created a parallel tax system that forgoes all the deductions for a slightly lower tax rate so it's very easy for simple filings to just hit the OK button.