Try taking the following steps to delete Form 2210 from your return:
Log into your account and select Take me to my return.
In the left-hand menu, click the Tax Tools drop down menu.
Under "Other Helpful LInks..." select Delete a form.
Scroll down to find Form 2210 and click Delete.
Confirm that you would like to delete the form and click Continue.
Scroll down to the bottom of the forms list and click Continue my return (bottom right), to go back to your return.