No budget for software. Young engineer with two years of experience.
Column dimensions, reinforcement ratio (ρg), number and size of bars, axial load (Pu), moments (Mux, Muy), unbraced length, end conditions.
Beam width, effective depth, concrete compressive strength (f’c or fck), steel yield strength (fy), ultimate moment (Mu), ultimate shear (Vu).
However, a spreadsheet is only as good as the engineer using it. You must understand the underlying mechanics, verify outputs against code limits, and never assume a green "PASS" message is infallible.
For students: download every spreadsheet you find, take them apart, and rebuild them. That process will teach you more about concrete design than any textbook.
Required footing thickness, reinforcement area and spacing, bearing check at column-footing interface.