I withdrew 2018 my RMD on 12/24/2018, filed my return 4/5/2019, but I received a tax penalty on 4/29/2019 for "Failure-to-pay proper estimated tax" for 2018. I had no other income for 2018 other than a monthly pension of $24.93 (total of $299.16, which I added to the RMD). Am I supposed to pay tax on income I haven't received yet (the RMD)? The billing summary (attached) shows tax I owed equaled exactly my "payments and credits" to the penny. But added $223.61 for "failure to pay proper estimated tax penalty." Never explained why there was a penalty.
the problem is that the IRS assumes the retirement income is received evenly throughout the year. so they use the simplified method to compute penalties. do as Lisa995 suggests prepare the AI section of 2210 and send it in with notice. respond asap and use tracking service. the IRS usual position is that if you don't respond timely, then you agree with them