Connecticut Non-Resident Taxes
You are considered a nonresident if you are legal resident of another state.
Nonresident And Part-Year Resident should use the Form CT-1040NR/PY and also should use Schedule CT-SI to figure out the Income from Connecticut sources.
Forms
CT-1040NR/PY and Schedule CT-SI
Reference
Part Year Resident
You are a part-year resident if you moved to Connecticut and became a resident during the tax year or you moved out of Connecticut and became a resident of another state.
Part-Year Residents with must file a Connticut tax return must complete and file Tax Form CT-1040NR/PY, Nonresident And Part-Year Resident Return. They should use the Worksheet CT-1040AW and Schedule CT-SI to figure out the part year income allocation to Connticut sources.
Forms
CT-1040NR/PY, Worksheet CT-1040AW and Schedule CT-SI
Reference