If my parents haven't filed their 2006 tax return yet (they plan to file an extension), then how do I fill out the FAFSA? The FAFSA worksheet specifically asks what their gross income e.t.c. is from their 2006 return. Do I fill it out with a 2005 tax return? Or do I use their estimated 2006 values? (This could be a problem too as they won't have a final value of estimated gross income/tax liability until early April). The same goes for me.. I likely won't have my 2006 return finalized until early April.