Complete and sign this form if (1) a tax return preparer filed a Form 1040 series tax return or altered your Form 1040 series tax return. Request the original return using CC ESTAB, Form 2275, or use the MeF return.This is the easiest way to electronically fill out the forms and prevent losing any information that you've entered. You can use these forms and instructions to file City tax returns. To file amendments for existing registrations, find and open the record through the "Search" tab in the Business Filing Services portal and request access. The landlord does not fill out this form. REQUEST FOR TAXPAYER IDENTIFICATION NUMBER AND CERTIFICATION (IRS Form W-9). 1 (IPU 24U0331 issued 03042024) Removed requirement to include corrected Form 1040X when issuing Letter 4364C. As always, the IRS reminds taxpayers to not file duplicate forms or respond to letters or notices more than once. Submit both forms along with.