late payment interest on an amended return

[Manual6]

Good morning, I cannot get Lacerte to calculate interest owed on a 2018 amended return with a balance due. I have entered the filing date and the interest rates in Options. Thank you in advance.

[George4Tacks · Accepted solution]

The program will not do this. You would have to manually calculate. You don't know when IRS will get the return, so you really can't do it with assured accuracy. I always let IRS do the work and bill the client. I let the client know. 

[BobKamman]

https://goodcalculators.com/irs-interest-calculator/

If you come within $5 they won't bill you for the difference.

[Manual6]

thank you.