I have the same issue with my deceased father's tax return. I had to file on paper because I needed to include the proof that I am allowed to get it. As my father had a Will, and the estate is administered via small estate, I couldn't just fill out the form 1310.
I sent it via certified mail and attached the original (!) letter of administration from the surrogate court that was specific to the tax refund. NY State gives letters for individual items. According to USPS tracking, they received it on March 10.
When I enter my father's information on "Where is my refund", the website cannot find it. I am worried because I sent the original letter of administration.
