As happened to many others form 2210 with box A checked was not accepted by the IRS even though I have a tax refund and no penalty is due..
I went to forms and choose form 2210 on the L side under Forms. Double click and form 2210 came up . Then on form 2210 close to the top I clicked on C: allow the IRS to calculate the penalty for me. Secondly I scrolled down to line 17 and at the bottom of line 17 is a quick-zoom button which when clicked brought a waiver explanation page. I filled out here that I was getting a tax refund and no penalty was due. The IRS now accepted the form.
