You better send in an estimated payment ASAP!
To prepare estimates for next year you need to be in your current return. If you can't get your return open, Try this, you can sign back onto your account, click on Add a State. This should get you back into your return. Be very careful not to change anything in your actual return.
You can just type W4 in the search box at the top of your return , click on Find. Then Click on Jump To and it will take you to the estimated tax payments section. Say no to changing your W-4 and the next screen will start the estimated taxes section.
OR go to
Federal Taxes or Personal (Self Employed or H&B version)
Other Tax Situations
Other Tax Forms
Form W-4 and Estimated Taxes - Click the Start or Update button
Say No to W4. When you get to the W4 and Estimated Taxes section, say you want to adjust your income to go though all the screens.
If you didn't owe or missed making the prior quarterly estimated payments and need to just calculate starting now, you can go though the Estimated Taxes section and just put $1 (one dollar) in for the quarters you missed. Then it will only figure the current and remaining quarters.
Here are the 1040ES instructions and blank forms (where to mail is on page 4)
http://www.irs.gov/pub/irs-pdf/f1040es.pdf
Or you can pay on the IRS website. Be sure to pick 2020 1040ES payment
https://www.irs.gov/Payments
