My husband and I are filing Federal taxes jointly but because we live in different states have to file separate state returns meaning we have to mail in the state returns. When we mail in his MA and NY returns, what other documentation must we include? I had heard that we have to include the 1040, but that isn't listed on the instructions. Also, wouldn't that lead to some confusion as the 1040 is coded as "Married Filing Jointly" but the states are coded as "Married Filing Separately?"
