Taxes for 2016 and 2017

Hi everyone,

I have a business but I have never filed taxes on/for the business...
I, this year 2018, requested an EIN for the business. I set up an LLC and I want the LLC to be taxed as an S-Corp.

I did (and continue to) make money for the past 2 years in my business...

How do I go about filing back taxes for 2016 and 2017?
Do I just download the forms for 2016 & 2017 and complete them and mail them into the IRS?

I don't want to cause myself an audit or any IRS headaches... but I do want to be legal and file taxes properly for the past two years.

Looking forward to hearing from you all and thanks in advance!

K

Taxes for 2016 and 2017