It is extremely rare that MFS is beneficial, so you may be doing it wrong. There are also special calculations if you live in a Community Property State. You cannot use HOH if you are married and live together. Further, Form 8332 is used only by divorced or separated parents. See this for more:
Should You and Your Spouse File Taxes Jointly or Separately? - TurboTax Tax Tips & Videos (intuit.co...
