I accidentally entered "AGI for 2021" I should have entered "AGI for 2020".
The correct answer is to go all the way through the filing process until I reach the part where I am ready to e-file. At that point I will be asked to input my previous year's AGI value. Unfortunately, this tidbit of information is not available in the online help file. I had to call turbotax support to get the answer.
Thanks to those who offered suggestions
