Does Estate or Beneficiaries Pay Capital Gain Taxes

I am working on the estate taxes for my mom’s estate.  The only beneficiaries are myself and my sister. We sold her house and have a capital gain on the selling.  Does the estate pay the tax on the capital gain or does this need to be passed to my sister and I  through the K-1s?  If the estate pays the capital gain tax and there is no other income from the estate do I need to create K-1s for myself and sister? If no K-1s need to be generated is it necessary to enter any beneficiary info in TT?   -Thanks