Irs changed tax due for 2018 230D

[DoninGA]

What is the IRS notice number you received, usually preceded by either a CD or LTR on the first page?

The IRS notice should describe exactly what they changed, added or deleted from the tax return that was filed and why.

What does 230D mean?

[murphyjo18]

CP11, no error made on input of income on return everything input correctly, AGI stayed same, states we changed amount of tax due as addition was of tax due incorrect so error in turbo tax calculation

[DoninGA]

Call the number on the IRS notice and get an explanation of exactly which calculation they are referring to in the notice.  Ask about the specific Line numbers on specific forms or schedules and why the IRS believes the calculation is in error (the IRS does make mistakes).  

Please reply back after speaking with the IRS.