Get your taxes done using TurboTax

How come it doesn't matter what is shown for social security and medicare wages or withholdings?  I thought any TAXES that are WITH HELD, and you got a W-2 for them you HAD to show that?  Isn't that like any other tax that gets withheld and you have to show?  And if you took up on the Turbo Tax Community Board 1/2 the EXPERTS tell you, you DO have to file the W-2, even with ZERO in the wages...  It's VERY confusing...