I don't trust anyone! TurboTax gives me one number, my accountant gives me another, and my by-hand version is yet another that my accountant comes around to eve

I don't trust anyone! TurboTax gives me one number, my accountant gives me another, and my by-hand version is yet another that my accountant comes around to eventually. The sad part is that each party is figuring out something unique that the others didn't because it is all so complex. Each route prompts different questions, which, together, make things more accurate. I hate it.