you can request a transcript for each year from the IRS. they will only contain info on items of income and all W-2 info except for the state part if any. It should also have mortgage info. for full K-1 info you may have to go back to partnership.
see this link for ways to get IRS transcripts
in your situation I strongly recommend you engage the services of a pro.
https://www.irs.gov/individuals/get-transcript
