I didn’t think I was asking them for technical tax advice…I’m aware they cannot provide that. I thought I was just asking them how their program works - at what age their program changes from requiring information pertinent to the parent to information pertinent to the child…to me, that is specific to their system, & something technical support should be able to provide. Pub 1345 notes a differentiation (for using self-select PIN, not esignature) between under age 16 & age 16+, so I was thinking the program might use those same age levels.

I’m also aware of the language a parent would use to sign with a wet signature. I had one case using esignature where I had the parent sign & the system asked questions specific to the parent, not the 6yo child, & one where the questions were specific to the 16 yo child, so I assumed it was based on the age & wanted to understand what that age was in the PS system. I've not seen that an esignature is not allowed unless the taxpayer is the one signing. If I understand you, you’re saying only a wet signature is allowed & an esignature is not allowed unless the taxpayer is the one signing the esignature form, correct?