1040 + the corresponding state return if applicable.

I THOUGHT I WOULD HAVE TO USE A 8606 FORM 

What software are you using?

I am using ProSeries.

You'll input the IRA contribution on the IRA worksheet (you can link to it from Line 19 of the 1040/1040SR worksheet). The 8606 may or may not play a part in this reporting, depending on other details and circumstances of the return.

I NEED TO OFFSET A DISTRIBUTION TAKEN IN OCT. 0F 2020 FROM A IRA.

That sounds like an indirect rollover.

So you have a distribution that was rolled back  into the account within 60days?   

That's an indirect rollover and would get input down on Page 2 of the 1099R worksheet.