After you file

wow!

the way is to amend and enter the value.

by  not correct I assume you mean Line 6 is still zero.

you don't need line 6 if you are not using Part I, or you skipped Line 4 and went to Line 14.

In that case the total value is used to calculate a penalty, if any.

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You should not file the amendment electronically if Form 8606 is not correct.

 

 

did you save your revised return, and exit TurboTax and then look again.?

sometimes "Print" function does not keep up with your changes, another TurboTax "feature".

Otherwise, contact Customer Support .

reply with an image of form 8606 with your name and ssn blacked out, so we can see it.