Yes, they are all required. Per Iowa's Department of Revenue-instructions, include all necessary supporting documentation and a copy of your federal return. Place documents in the following order:
- Check or Money Order
- Payment Voucher (1040V)
- W-2s / 1099s
- IA 1040
- Iowa schedules, forms, and supporting documentation
- Copy of complete Federal return. Do not staple supporting documentation to the IA 1040. Include all required schedules, even if the schedule results in zero dollars.
For more information, see 2018 IA 1040 page 133 under Supporting documents.
