The instructions from Turbotax read, "Staple the state copy of each of your W-2s and 1099-Rs to the front of the return.
-Attach and sign a copy of the return filed with the other state."
I filed with three other states. Do I need to send copies of each of these state tax returns? This seems a little much.
Yes, you need to attach a copy of any other state return that you took a credit for taxes paid to another state with the AR return. This is per the AK instructions listed below (also with the link).
"You must attach a complete signed copy of the other state’s tax return to verify
the tax liability due the other state. The amount withheld on your W-2 form for the
other state is not the amount of credit you can take."
Source: http://www.dfa.arkansas.gov/offices/incomeTax/individual/Documents/505-OtherStateTaxCredit.pdf
Yes, you need to attach a copy of any other state return that you took a credit for taxes paid to another state with the AR return. This is per the AK instructions listed below (also with the link).
"You must attach a complete signed copy of the other state’s tax return to verify
the tax liability due the other state. The amount withheld on your W-2 form for the
other state is not the amount of credit you can take."
Source: http://www.dfa.arkansas.gov/offices/incomeTax/individual/Documents/505-OtherStateTaxCredit.pdf