On form 8379 "Injured Spouse" as I'm going through the questions, it comes to the section: Allocate Taxes, Credits, and Payments.  I'm able to determine the information (amounts) for "Other Taxes" and "Income Tax Withheld" but the 3rd one, "Tax Payments" I have no idea where this amount/figure came from.  How do I find out where this dollar amount was calculated and where do I find this information?  I can't find any answer as to what "Tax Payments" is referring to and how do I determine what portion of the dollar amount listed is mine and what portion is my spouses?