Why not input the mailing address under the US Address section in the Info Works?  As long as the information flows to them, is there a need to have the actual "residence address" on the return?

You just use the mailing address on the return....I know some states, like CA, does have an extra place to input a physical address, but IRS doesnt seem to care.

If the physical address is part of your due diligence for HOH, just make note of it in your DD notes.