Retirement tax questions

If I have a penalty for Underpayment of Estimated Taxes because of a large November income that made previously received untaxed Social Security Benefits taxable, can I file Form 843  (Claim for Refund and Request for Abatement)  to request a refund of the penalty?

 

I'm thinking this could work, or is there a different form I must use?

I think I would check the first box under Penalty (Abatement or refund of a penalty or addition to tax due to reasonable cause or other reason allowed under the law)

and explain why the estimated taxes for Q1 changed because of events in Q4.

 

Do you agree?