Get your taxes done using TurboTax

I was close to finishing yesterday, after adding some sales of stock. Curiously, the "Federal tax" due hadn't changed from when I added social security income. I check the 1040 and the "adjusted gross income" is $47000 and the tax due is $650. I haven't paid any taxes at all, for the year. Huh? This led to having to reinstall and the program stating I needed to download a state. Already downloaded, but when I click, it hangs. Got that sorted and attempting a new return. IS there a glitch in this program?