Can I amend my prior returns through TurboTax even if they were not originally filed with TurboTax?
I have had an accountant do our taxes the last several years and this year I am doing them myself with TurboTax. I have found several deductions that the accountant did not do for us (Home office, etc). Can I use TurboTax to file amendments for 2007,2008 and 2009 even if they were not originally filed with TurboTax? If so, should I do these amendments before I complete my 2010 return?