I bought turbotax premier on a dvd and cannot run it on my computer because OS is too old. How do I switch over to turbotax online without paying another fee???

Get your taxes done using TurboTax

You'll have to request a refund. Here's how: TurboTax CD/Download Refund Request Form.

If you don't receive the refund by 4/15/19, you'll have to file an extension.See How do I file an IRS extension (Form 4868) in TurboTax Online?