I followed the instructions found at "How do I enter a backdoor Roth IRA conversion?" in the F1 Help. But when I checked the results of the backdoor Roth IRA conversion (as it says to below) on Form 1040, Line 4B Taxable amount was showing as $8000 instead of zero, as it should have been. Why ? What did I possibly enter incorrectly?
Select Forms from the menu.
Select Form 1040 from the menu.
Use the scroll bar to find:
Line 4a IRA Distributions. Your backdoor Roth IRA amount should be listed.
Line 4b Taxable amount should be zero, unless you had earnings between the time you contributed to your Traditional IRA and the time you converted it to a Roth IRA.
Try reviewing your entries in the Traditional IRA contribution section. If the conversion is showing as taxable, then the Traditional IRA contribution may not have been non-deductible.
You can also take a look at your Schedule 1 line 20 to see if it has a value there or if it is blank. If there is a value, then the Traditional IRA contribution is being deducted when it shouldn't be.
Review the instructions again, paying close attention to step 1 of the process: