This document is a Nebraska Individual Income Tax Form 8453N for tax year 2008. It provides instructions for taxpayers who e-filed their Nebraska state tax return but need to submit additional forms or documentation to substantiate claims or credits. The form lists various attachments that may need to be mailed in, such as Form 1099-MISC or Form 1310N for a deceased taxpayer. It also provides mailing instructions and contact information for the Nebraska Department of Revenue.