My client is an S-Corporation and I am working on Form 6252 in the 1120-S.  My client sold his business on an installment basis.  I sold the tangible assets in the AEW sheets most of this information was transferred to Forms 4797 with the exception of assets that had a 179 deduction.  I am trying to get Form 6252 to calculate the correct percentage for the Sale.  He sold for $250,000 and received $100,000 this year.  The form requires the same information that is in AEW.  It would appear that this document is not calculating correctly.  Is there another way to enter this information so Form 6252 will work?