Filed on Extension? Your Form 2210 Safe Harbor May Still Protect You

Steve Perry

Published on: 08/10/2026

Filing late didn't make your Form 2210 penalty worse. The safe harbors still apply, but the reductions only work if you claim them. Here's what to check before October 15.

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How to Calculate (and Not Underpay) Your Q3 Estimated Tax Installment

Steve Perry

Published on: 09/09/2026

The Q3 estimated tax installment is not last year's bill divided by four. See how uneven income and withholding timing affect what is owed by September 15.

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