Form 4868 using TurboTax Easy Extension - Line 6

Today, I submitted a Federal Personal Extension, Form 4868, using TurboTax Easy Extension.   After submission I was given an opportunity to print the submitted form.   I noticed Line 6 was auto filled incorrectly.  My Line 5 amount was $6000 more than the Line 4 amount.  When Line 5 amount is more than Line 4 then Line 6 should be filled with -0-, as per the 4868 instructions.   But the TurboTax Easy Extension filled it with $6000 instead of -0-.    Today is the last day for extension.  I may not get the results of the acceptance of electronic filing for 48 hours. Should I submit a paper version with a -0- in Line 6?