It's good that you were able to pay 20k along with your extension. I can't think of any specific online resources that would help (note that I mistakenly said

It's good that you were able to pay 20k along with your extension. I can't think of any specific online resources that would help (note that I mistakenly said Quickbooks Online instead of Turbotax Online in my original post - I run Quickbooks, but do taxes in Turbotax or by hand). Maybe you could find a better CPA, if you really feel you have to have one. Do you know your actual tax liability from your return? If not, you could go on the Turbotax website and figure it out without paying anything, unless you actually file through them. Do you know all your deductions, etc? Since you live in NYC your rent could be a big deduction, if ever work from home. If I were you I would go through Turbotax Online and diff that against what your CPA is telling you, as a first step.