Are you referring to line 22 on your Form 1040?
If it is blank, it means you do not request to apply your refund to pay for your 2020 estimated tax. If the IRS accepts your return and things go smooth, you should be receiving the total refund shown on line 20 of your Form 1040.
See the image below:
Mike12300, if you forgot to include income you may need to amend your return. Please read the following instructions:
If you have already filed the return, you will not be able to make changes to it. You will have to amend it. Do not amend until you have determined if the IRS accepted or rejected the return. If accepted wait until either you have received your refund or any payment you have made to the IRS has cleared. If rejected you may go ahead and amend.
You will be able to amend as soon as Form 1040X becomes available. At this time the expected date of availability for the form 1040X is
02/20/2020 , however that date is subject to change. You can track it's availability by going to the following link.
https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
If you need to make changes to your return prior to filing your Return:
Log in to your TurboTax Online Account
From the Overview page
Click on My TurboTax
My Tax Timeline
In the Some things you can do area
Select Add a state
This will let you back into your Return to complete and File it.