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?
That is asking for the amount of estimated tax payments made during the year. If there is a number there, you must have some estimated tax payments on the return. Generally people make estimated taxes when they are self-employed, or if they come into some unexpected money that does not have taxes withheld (for example, gambling winnings).