Forget buy-to-let! I’d invest in a Stocks and Shares ISA to retire a millionaire Our 6 ‘Best Buys Now’ Shares “This Stock Could Be Like Buying Amazon in 1997” I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. Harvey Jones | Wednesday, 29th April, 2020 Simply click below to discover how you can take advantage of this. See all posts by Harvey Jones Enter Your Email Address Image source: Getty Images. If you want to retire a millionaire and make the most of your advanced years, I’d choose a Stocks and Shares ISA over alternatives such as buy-to-let, every time.Investing via an ISA has many advantages. Once you’ve set up an online platform, you can buy and sell shares in seconds. Even better, all your returns are completely free of income tax and capital gains tax, for life. The costs are minimal. You cannot say any of this about buy-to-let.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Investing in a buy-to-let property is a hard way to fund a millionaire retirement, and the Covid-19 crisis has only made it worse. There are growing reports of landlords struggling to fill empty properties due to the lockdown. Others are struggling to collect the rent, because tenants have lost their job, or been furloughed.Who wants to retire a millionaire?Landlords will be extending payment holidays to many, rightly so, but that’s three months without income. And what if tenants still cannot pay the rent after that? Then you face the kind of heart-breaking decision you’ll never face if you invest in a Stocks and Shares ISA.Buying and selling property is also effortful, and you face punitive tax charges at every turn. These include a 3% stamp duty surcharge on purchases, while higher rate tax relief on mortgage interest payments has been scrapped. This makes it harder to earn enough money to retire a millionaire.As I said, there’s no tax to pay at any point in a Stocks and Shares ISA. At least until you die. Even then, you can pass them tax-free to a spouse or civil partner.Another attraction is that, unlike property, shares are liquid. Property takes months to buy and sell, shares take seconds. This means you can seize opportunities like the current stock market crash to load up your portfolio and retire early.Thousands have already become tax-free millionaires by investing in stocks and shares through an ISA. With the allowance now lifted to £20,000 a year, their numbers will only grow.I’d load up by a Stocks and Shares ISAThe stock market crash is a great opportunity to load up your ISA portfolio with bargain FTSE 100 stocks. There are plenty of top companies going cheap right now. Better still, you can buy them online, without breaking any social distancing rules.Naturally, you won’t become an ISA millionaire overnight. You should aim to invest as much as you can afford each year, then hold on for the long-term. It’ll take a few decades, but you should get there if you stick with it.A Stocks and Shares ISA is the best way I know to make a million from investing. It’s certainly easier than buy-to-let. Harvey Jones has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. 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