As a language model, I am not capable of providing tax or legal advice. However, I can explain how Social Security benefits are taxed and under what circumstances a person may no longer have to pay taxes on their Social Security benefits.

The taxation of Social Security benefits is based on the individual’s combined income, which includes their adjusted gross income (AGI), nontaxable interest, and half of their Social Security benefits. If the individual’s combined income exceeds certain thresholds, a portion of their Social Security benefits may be subject to taxation.
For individuals who file as single, head of household, or qualifying widow(er), if their combined income is between $25,000 and $34,000, up to 50% of their Social Security benefits may be subject to taxation. If their combined income is above $34,000, up to 85% of their Social Security benefits may be subject to taxation.
For married couples filing jointly, if their combined income is between $32,000 and $44,000, up to 50% of their Social Security benefits may be subject to taxation. If their combined income is above $44,000, up to 85% of their Social Security benefits may be subject to taxation.
It’s important to note that these thresholds are not adjusted for inflation and may change in the future.
There is no specific age at which a person stops paying taxes on their Social Security benefits. Instead, it depends on their combined income and whether they have other sources of taxable income. If a person’s combined income is below the threshold for their filing status, their Social Security benefits may not be subject to taxation.
In some cases, a person may no longer have to pay taxes on their Social Security benefits if they have little to no other sources of taxable income. For example, if a person’s only income is their Social Security benefits and their combined income is below the threshold for their filing status, their Social Security benefits may not be subject to taxation.
Additionally, if a person has retired and is no longer receiving income from working, they may have a lower combined income and therefore, may not have to pay taxes on their Social Security benefits.
It’s important to note that Social Security benefits are not automatically exempt from taxation once a person reaches a certain age. Instead, it depends on their individual circumstances, including their combined income and other sources of taxable income.
In summary, there is no specific age at which a person stops paying taxes on their Social Security benefits. The taxation of Social Security benefits is based on the individual’s combined income and whether they have other sources of taxable income. If a person’s combined income is below the threshold for their filing status, their Social Security benefits may not be subject to taxation.