For PA state tax filing, what is "Interest Income Worksheet State ID"

[eliskim]

Turbotax won't let me e-file until I resolve an outstanding problem with my filing prep. It says, "Check This Entry: Interest Income Worksheet: State ID-2 -- enter the source state postal code for this exempt interest." Nowhere on the internet is there any form called "Interest Income Worksheet" for PA. There is something called PA "Schedule A: Interest Income" but that does NOT have a box called, "State ID." What is this? And why am I paying $40 if Turbotax can't even identify stuff that's on the PA tax forms?

[PaulC1]

It's looking for the 2-letter State abbreviation where the interest income comes from, like "PA" or "NY". On the screen where the error pops up, do you see a box where you can make the entry?