the individual mandate requiring people to have health insurance or face a tax penalty was effectively eliminated in the United States starting in the tax year 2019. The penalty for not having health insurance, often referred to as the individual mandate penalty, was reduced to zero dollars as part of the Tax Cuts and Jobs Act passed in 2017.

Therefore, as of the 2019 tax year and onwards, individuals are not required to show proof of health insurance coverage when filing federal income taxes. This change means that you won't face a penalty if you do not have health insurance, and you are not obligated to provide any documentation related to your health coverage when submitting your tax return.

However, it's essential to stay informed about any updates or changes in tax laws, as legislation can be subject to modification. Tax laws and healthcare regulations may evolve, and it's advisable to check with the Internal Revenue Service (IRS) or a tax professional for the most current and accurate information regarding health insurance requirements and tax filings.

The termination of health insurance coverage for 26-year-olds under a parent's plan with Blue Cross Blue Shield, or any other health insurance provider, is generally tied to the Affordable Care Act (ACA) regulations. According to the ACA, young adults can remain on their parent's health insurance plan until they turn 26 years old. This provision aims to provide extended coverage for individuals transitioning into adulthood and may not yet have access to employer-sponsored insurance or other coverage options.

Once an individual reaches the age of 26, they typically lose eligibility for coverage under their parent's health insurance plan. At this point, they have several options to consider. They can explore employer-sponsored health insurance if offered by their workplace, purchase an individual health insurance plan through the Health Insurance Marketplace, or explore other coverage options based on their circumstances.

It's important for individuals approaching the age of 26 to plan ahead and consider their healthcare coverage options to ensure a smooth transition without any gaps in coverage. Blue Cross Blue Shield, like other insurers, typically provides information and assistance to individuals in this situation, guiding them through the process of obtaining new health insurance coverage. It's advisable to check the specific terms and policies of the Blue Cross Blue Shield plan in question and contact the insurance provider for details on the continuation of coverage beyond the age of 26.