Get your taxes done using TurboTax

If I need to do my taxes this year or not. Last year 2016 my tax dude retired and states that I didn't need to file again.  
Well he was wrong. I just got a letter from IRS saying we need to do 2016 as well. It looked like it had to do with owning a house?! All I know now is I need to do both. Can I do them together. Or send in the 2016 with the paperwork they sent and send it in May.   I need to do them huh? We make $4184 per month