Definitely use only the taxable portion of your social security in your calculations for estimated tax payments when using Worksheet 2-2. You can attempt the waiver by selecting Box A and If the IRS disagrees they will let you know.
Your statement should use some of the wording from the IRS instructions here and could be understood and possibly waived with the bold print:
- If you have an underpayment, all or part of the penalty for that underpayment will be waived if the IRS determines that:
- In 2024 or 2025, you retired after reaching age 62 or became disabled, and your underpayment was due to reasonable cause (and not willful neglect);
Your taxable social security can be hard to determine based on income, unless you know in advance your will be tax on the maximum of 85%.
Please update if you have more questions.
@domerdoc
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