BUSIform
Filing Addresses for State of Connecticut
Federal
Busiform Envelope
Envelope Size
State
Busiform Envelope
Returns with Refunds or No Payment

Internal Revenue Service
Kansas City, MO 64999-0002

EF10-7
EF69-7
EF912-7
#10½
6 x 9
9 x 12
Connecticut Dept. of Revenue Services
PO Box 2976
Hartford, CT 06104-2676

ECT1-R
ECT6-R
ECT9-R

Returns with Balance Due Internal Revenue Service
PO Box970011
St. Louis, MO 63197-0011
EV10-8
EV69-8
EV912-8
#10½
6 x 9
9 x 12
Connecticut Dept. of Revenue Services
PO Box 2977
Hartford, CT 06104-2677
ECT1-O
ECT6-O
ECT9-O
Estimated Payments Internal Revenue Service
PO Box 970006
St. Louis, MO 63197-0006
ES09-9
#9
PO Box 2932
Hartford, CT 06104-2932
ECT9-ES
Corporations, Partnerships, etc Internal Revenue Service
Cincinnati, Oh 45999
EF10-4
EF69-4
EF912-4
#10½
6 x 9
9 x 12

Note: Addresses above reflect latest information we have available, but are subject to change. If you have more up-to-date information, please Thank you.