one or the other has incomplete or inaccurate info entered. we have no way of determining which, if either, is correct. it's also possible on one you're looking at your refund while on the other you are seeing your tax liability before withholding.
we might be able to help, but we would need to know your adjusted gross, income, filing status, number of dependents, and whether you are 65 or older or perhaps this would help an $800 tax liability assuming no dependents, tax credits or special tax calculations would indicate taxable income (line 15 of 1040) of around $8,000 while $2,000 in a tax liability would indicate, based on same conditions as above, of around $20,000
