You have more than enough expenses for the ESA distribution to be tax free. For that reason, you don't need to know the basis of the account.
Save yourself the trouble (the interview can be complicated) and just don't enter the 1099-Q. As previously explained, it is only an informational document and is only entered on your return if some of it is taxable.
You can claim the full Tuition credit. Enter the 1098-T to do that. You can skip entering any other numbers as the $18,420 in box 1 is more than you need.
I am curious. Was Box 2 of the 1099-Q actually 0? Or was it blank? What was in box 3?
