I need to revise the estimated tax for 2020 as my rmd payments will not be included in my 2020 return and they are a substantial part of my reportable income.

You can go into the program and enter your expected information for 2020 and the program will generate and adjust your estimates if needed. 

Go to the federal interview section.

1. Select Other Tax Situations 
2. Select Other Tax Forms 
3. Select Form W-4 and Estimated Taxes 
4. Proceed to answer the questions as applicable
5. Based upon your answers, the program will determine you need to make any additional estimated tax payments or not

It worked! Thank you sooo much!!