The nutrition information is based on standard product formulations and serving sizes (including ice for beverages). All nutrition information is based on average values for ingredients from McDonald's suppliers throughout the U.S. and is rounded to meet current U.S. FDA NLEA guidelines.
Well, it is true that everyone has to pay taxes, there are exceptions, especially for people age 65 and older. But there is no age at which you stop filing. You just need to check your income and the tax rules every year to determine if you need to report any of your income.
If you are under age 16 and you have never filed a tax return, you cannot efile your first year. You can prepare your 2016 return on efile.com, print it, and mail it to the IRS to file it. However, you will be able to efile your return the next year.