Amending a Return - 1099-INT
I am about to file my 2020 return. I just noticed that my mortgage company included a 1099-INT with my mortgage interest statement. I went back and realized I missed this on my 2018 return and 2019 return, but included it in 2017 because it was a separate document at that time. I am assuming I should go back and amend both returns. Can someone confirm? Also, with regards to timing:
Can I file my 2020 return now?
Can I amend and submit both the 2018 and 2019 returns at the same time (and I know they need to be submitted separately)?
And is this an acceptable justification to include on both amended returns:
I was getting ready to file my 2020 Tax return and noticed my Mortgage Company included a 1099-INT with my Mortagge Interest Statement, instead of a separate document. Due to this, I neglected to add this as income on my 2018 and 2019 returns, so I am amending both.
