Thank you both for the very useful (and timely) replies!
Just one last clarification: if i choose to pay estimate tax on Oct. 16, which ends up being an overpayemnt, then I understand that IRS will actually provide me a refund which will actually include an overpayment interest, correct?
Specifically, I understand the overpayment interest i will get from IRS will be the federal short-term rate plus 3 percentage points, i.e. currently around 8.5%. Is this also correct?
Thanks again!
