I just received a letter from the IRS stating they increased last year's underpayment penalty by 153%. I'm retired and most of my income is from investments. I choose to skip the estimated tax payments because in general I make more money from my investments than the cost of underpayment penalty. I've used Turbotax for decades with hard copies mailed in. Yet here in November, they send me a letter demanding 153% more money in 3 weeks claiming they "found an error". Doesn't Turbotax guarantee that all calculations are correct? Shouldn't Turbotax pay the extra because of the "error"? How do I get through to Turbotax because so far I can't find a way to contact them. Thanks.
