Backdoor Roth - 4b not showing zero

[68Driver]

I've completed the two-step backdoor Roth conversion process, but line 4b on my 1040 form is not showing zero.  How do I fix this??

[DanaB27]

Did you have earnings before you converted the funds? These will be taxable on line 4b.

Or did you have pre-tax funds in your traditional/SEP/SIMPLE? if yes, then the pro-rata rule applies. This means that with each distribution/ conversion you will have a taxable and nontaxable part. 

You might want to look at Form 8606 to see how the taxable part was calculated.

Please see How do I enter a backdoor Roth IRA conversion? for additional information.