What is ITR 1, ITR 2 etc. How to file an ITR? Which ITR I am eligible to file?

Hi, I am software professional newly joined to this industry. I would like to know the details like ITR 1, ITR 2 etc. I would also like to know to which ITR I am eligible to file. Also, Can I include the loan documents that I currently paying for in the ITR that I file? Please let me know.
Thanks & Regards
Krishna

We are Income Tax consultant based on Delhi NCR. Please connect with for filing your Income tax retun.
Your eligibility of filing tax return can be decided based on various source of Income you received during FY 18-19
ITR -1 is For Individuals being a Resident (other than Not Ordinarily Resident) having Total Income upto Rs.50 lakhs, having Income from Salaries, One House Property, Other Sources (Interest etc.), and Agricultural Income upto Rs.5 thousand(Not for an Individual who is either Director in a company or has invested in Unlisted Equity Shares)
ITR-2 For Individuals and HUFs not having income from profits and gains of business or profession
ITR-3, For individuals and HUFs having income from profits and gains of business or profession