Where do I enter Social Security income when figuring estimated taxes?

I'm using TT Premier on a Windows PC to compute my estimated taxes for 2023 (under "Federal taxes, other tax situations, other tax forms"). Where do I enter Social Security income? There are places to enter wages, investment income, self-employment income, and then all other income is lumped together in "other income." From what I understand, SS income is taxed differently, so it doesn't make sense to enter under "other." Where do I enter SS income to get the best estimate of my 2023 taxes?