FYI, I ended up printing/mailing in the forms (including the entire State return). The new PTE forms are pretty straightforward so it wasn't that big a deal. There is also a separate form (L-110) you also need to mail in to the Hawaii tax office stating why you are not filing PTE electronically; I commnicated with the Hawaii tax office and they understand the situation (note: they don't support electronic filing directly!) and said to just fill out the L-110 form.
Nonetheless, it's disappointing that TT Business is not-up-to-date for Hawaii; I successfully got a refund from TT.
