ITIN vs IRSN - what is the difference?
What is the difference between an ITIN and an IRSN? Both are tax ID numbers issued by the IRS for tax processing of US 1040NRs. One is permanent and one is temporary. PERMANENT - An ITIN (Individual Taxpayer Identification Number) is a permanent number issued by the IRS to all individuals who have a tax filing or tax reporting requirement. TEMPORARY - IRSN (Internal Revenue Service Number) is a temporary number used to log a 1040NR into the system by the IRS. It is issued aft