But why does the IRS take my spouse's income and assets into the equation even if she is not liable?
The IRS is always going to base their version of a financial analysis on TOTAL HOUSEHOLD income and expenses. If your wife has income, that is going to be automatically included. But because everything must be equal, we will also make sure that all household expenses are being considered as well. And then we will make sure that the mathematical formula is computed to take the percentage of the liable party's contribution to the total household income and multiply it by the expenses. So in essence, we take the non-liable person back out of the equation. That is the beauty of it.