After you file

I've already contacted TurboTax by phone 3 times. I have been directed to contact the IRS or to see what I can find on the community site so I am left with the impression that the people providing help at Turbotax are not particularly knowledgeable about the technology itself or taxes. I contacted the IRS and from the records they have for me on their site it appears that there are mistakes in Turbotax algorithms that no one is interested in resolving or able to explain how it is correct. Take for example my pension pay. When I read the IRS documents it states that box 5b on the 1040 should contain the taxable amount listed on my 1099-R. I have only one pension plan and no annuities and thus only one 1099-R. What Turbotax is filling into that box is nearly twice the amount from the 1099-R. The worksheet that Turbotax shows has the correct amount but somewhere it is converted to this other amount when placed in my 1040. Can you explain that?