Excited state optimizations
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It depends on the engine whether it is possible to do an
electronically excited state optimization, like an electronically
excited state geometry optimization, transition state search, linear
transit, PES scan, or IRC. Required is that the engine should be able
to calculate the nuclear gradient for a particular electronically
excited state. ADF and DFTB are engines that can do such calculations.
If the excited state gradient is available, one can also calculate an
IR spectrum of the excited state, and one could calculate a
vibrationally resolved electronic spectrum.

One should look in the documentation of the engine how to set up the
calculation of the excited state gradient.
