My accountant filed extension on April 17 for me and paid estimated tax by my bank account along with the extension application.
I have not yet finished my tax calculation completely but notice I owe more than I paid. Before I file the tax in the future, I want to pay NOW to reduce penalty and interest. My accountant no longer works for me.
How do I pay more by check? What information I should give along with the check so IRS know I am paying more for last year's tax?
