how does TurboTax compute capital losses. I believe it has made an error in mine. Has anyone else had incorrect computations or able to tell me how to find the details

I added gains and losses of household's five accounts together and came up with a figure for net capital loss. There were no wash sale reductions. TurboTax supposedly added up the same numbers and got a different number, much less. I cannot figure out how TurboTax got its number.