2020 done 2019 just amended now what?

[mtmproperty]

Already almost finished with 2020 return. Found error in 2019 recently and did an Amended 2019 return which I plan to file soon. What do I do now for 2020. Do I need to start a new return using the 2019 Amended? Please say it isnt so as my return is 60 pages or more.

[VolvoGirl]

Depends what you amended 2019 for.  Will it affect 2020?  You can probably manually enter anything you need to update on the 2020 return.  

[mtmproperty]

its mortgage interest on a SCH E.

it reduces my 2019 gross income and how does that affect my estimated tax payments since it reduced my overall tax amount due?

Also how can I use that amended return anyway since it wasn't yet submitted to the IRS.