The IRS requires all dollar amounts to be rounded to the nearest dollar ($49 or less is ignored - $.50 or more adds one dollar.) That is an IRS e-file requirement specified in the e-file requirements. The IRS e-file schemas do not have a "cents" field - only whole dollars.
In my opinion the reject is internal to TurboTax. Any IRS reject has a reject code and I know of no IRS code for duplicate forms.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
