TT shows that I owe an underpayment penalty. However I paid >90% of this yrs tax and >110 % of last yrs tax . I did do a Roth conversion, but sent in a estimated payment in that same quarter. How do I add a form 2210 onto my turbo tax filing? I am 62 and I did retire so I believe I met the exceptions. I did end up owing more than $1000.