No, the non-taxable Social Security is not added in. The only additions to AGI are the items that I listed above - foreign earned income and income from Puerto Rico and U.S. territories. For most people, MAGI for the deduction for seniors will be the same as AGI.
sadly there are multiple MAGI's. So be specific about the form and what lines or lines you are asking about
For the deduction for seniors in the new tax law, MAGI is Adjusted Gross Income (AGI), Form 1040 line 11, plus the Foreign Earned Income Exclusion and excluded income from sources in Puerto Rico, Guam, American Samoa, and the Northern Mariana Islands. So, to answer the question in your other post, the taxable portion of Social Security benefits is included, since it is included in AGI.
is the non taxable social security an additional add on to the 2025 senior deduct magi calc?
No, the non-taxable Social Security is not added in. The only additions to AGI are the items that I listed above - foreign earned income and income from Puerto Rico and U.S. territories. For most people, MAGI for the deduction for seniors will be the same as AGI.