Charitable Organizations must register with the Nevada Secretary of State's office before soliciting charitable contributions in Nevada. All charitable organizations must file this form each year, not later than the end of the anniversary month in which they first filed.To deduct charitable contributions, taxpayers must file Form 1040 and itemize deductions. The donor will use this letter as proof of his or her donation to claim a tax deduction. Find and download Nevada tax forms, including resources and guidelines to ensure accurate and timely filing with the Nevada Department of Taxation. Charitable organization required to register before soliciting contributions; filing requirements; information filed is public record. Complete this form to request your donation tax receipt.