@artg wrote:
....I hope you're correct with respect to the Safe Harbor rule.
You stated you paid 110% and that should be more than sufficient:
In general, taxpayers don’t have to pay a penalty if they meet any of these conditions:
- They owe less than $1,000 in tax with their tax return.
- Throughout the year, they paid the smaller of these two amounts:
- at least 90 percent of the tax for the current year
- 100 percent of the tax shown on their return for the prior year – this can increase to 110 percent based on adjusted gross income
See https://www.irs.gov/newsroom/the-basics-of-estimated-taxes-for-individuals
