@Just-Lisa-Now-  I believe all returns list the 2210 under forms in use, but if you don't owe, or have no requirement to use 2210, then that form is not filed, and you can efile even if the 2210 is not needed. I do know I efile returns not needing the 2210 before the form is ready with no problems. I did not have to turn off error checking. When you run review no error will show up, because you are not using 2210