How do you properly and safely amend the last 3 years of income tax returns for full refunds

How do you properly and safely amend the last 3 years of income tax returns for full refunds

You may have heard that you can legally amend up to three years of tax returns in such a way that the IRS sends you a full refund of all the income tax payments you have made in those years, including the Social Security and Medicare taxes you paid.