I am trying to translate the tax form CUD2011 for a friend. I got stucked on the "annotazioni" section where I read abbreviations such as Cod. AI, Cod AN, Cod. AY. Could someone lend me a hand with these?
"Cod." is most likely short for "Codice".
There must be, somewhere on the form (maybe at the very end?), a table of codes to explain such abbreviations. AI, AN, AY in this context are indecipherable even for a native speaker.