Well you already missed the first 2 estimates. Just pay the 3 & 4 if you think you need to. They are optional. To adjust them You can just cross out the amounts and write in a new amount.
To just estimate the remaining quarters put in that you paid $1 for the missed quarters so it will only calculate the remaining quarters.
To prepare estimates for next year you start with your current return, but be careful not to change anything. For Online returns, if you can't get back into your return, Click on Add a State to let you back into your retun.
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 (Desktop H&B)
Other Tax Situations
Other Tax Forms
Form W-4 and Estimated Taxes - Click the Start or Update button
Or Here are the blank Estimates and instructions…..
http://www.irs.gov/pub/irs-pdf/f1040es.pdf
