Reproduce in Python only sets reported state income tax in baseline, not reform

[anth-volk]

To be clear on this - if someone calculates a household in the US, then selects to create a reform, then wants to reproduce that entire thing in Python, would they need the same code US state income tax settings for both the baseline and the reform added in the same way that they are in Reproduce in Python for the policy calculator?

[MaxGhenis]

We should always apply the same reported_state_income_tax setting between baseline and reform. This should be true only for US-wide microsimulations; for state microsimulations and household simulations it should be false.

[anth-volk]

I hate to ask this question, but how does one apply a modified baseline (not reform) to a household Situation-type object? I tried defining a new TaxBenefitSystem type, but was unable to do so that way, and there's no parameter like baseline. I believe this is the last bit of code I need to work on before fixing this, #1327, and #1334

[MaxGhenis]

Same as with microsimulation: you modify the baseline by passing a reform. A modified baseline is just another name for a reform (effectively we're often comparing two reforms).

But we shouldn't need a custom baseline for household scenarios, only US microsimulations.