After you file


@AD2019 wrote:

Thank you for your reply, I think I have to wait for another bill from IRS. I also assume that the answer to my actual question is: "TurboTax does not support entering correct penalty and interest even when I know the exact numbers". Both numbers are not very difficult to get from IRS calculator.

 

This is disappointing. By the time IRS will bill me, additional fees will likely accumulate. It further  means that TurboTax makes it impossible to file extended tax report at once -- I need to wait for additional bill from IRS and make another payment before I can declare taxes completed.


If you are late and interest and penalties apply then ONLY the IRS can calculate that since it depends on the actual day that the IRS receives and processes your payment.   ONLY the IRS can know that.  Interest and late charges can NEVER be paid in advance - only the IRS can bill you for those.

**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**