Get your taxes done using TurboTax

Having difficulties using this website. I've been married for over 25 years and I've always filed single or head of household claiming my two boys. My husband's always had legal issues so I've kept things separate. I've always had a tax preparer did my taxes and after doing some research have found that I legally didn't have the right to file single or head of household. How do I resolve this issue which has now a problem?