Someone in another post had a great solution. NOTE - This only applies if you do not have an underpayment penalty, and is for the ONLINE version only (this is what I use).
Very simple (and don't know why TT support hasn't provided this solution. Revisit the section (other tax payments - underpayment) and set the Tax Paid in 2017 as 0.
Voila - the 2210 forms and any associated forms disappear!!!
Instead of spending hours trying to delete the forms (which doesn't work at least online), this seemed to have solved it. This only is good if you don't have an underpayment penalty.
