Many find the easiest way to figure the entries for Form. X is to first make the changes in the margin of the return they are amending.Find and download Nevada tax forms, including resources and guidelines to ensure accurate and timely filing with the Nevada Department of Taxation. Visit the official site for the Nevada Department of Taxation. It may take up to 2 weeks for IRS income information to be available for electronic IRS tax return filers, and up to 8-12 weeks for paper IRS tax return filers. You should send a copy of your request to the IRS attorney who filed the "Answer" to your petition. Nevada state filing information for taxexempt organizations. The IRS will mail the letters to people who typically aren't required to file federal income tax returns but may qualify for an Economic Impact Payment. If the IRS needs more information or the taxpayer must verify they sent the tax return, it will send a letter. Document and record the changed information on the Form 1040X, and then mail the amended return with the Form 1040X to your nearest IRS office.