It allows your employer to verifywith a signaturethe dates and locations you entered in the Date and Locations Template (pages 16). You can use these forms and instructions to file City tax returns.How do I fill out my mail ballot? Seal the yellow envelope in the pre-addressed outer return envelope. The abbreviated format is only used as part of the sender's symbol, or in the absence of the sender's symbol, as the date for the letter. This date should be listed numerically. List of Dates: List each date on which you worked outside of Philadelphia. Be sure that you are completing the tax return that says "REV-1500 Inheritance Tax. Learn more about each option and the steps you'll need to take to complete the application process. Admission Applications.