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.
There is no minimum age to file a petition for a spouse for immigration. However, you must be 18 years of age and have a domicile in the U.S. before you can sign the Affidavit of Support, Form I-864, and this form is required for an immigrant visa for spouses and other relatives of U.S. sponsors.