Final answer:
Paula can file her tax return by October 15th if she requests an extension, as the IRS grants a six-month extension for filing taxes from the April 15th deadline.
Step-by-step explanation:
If Paula requests an extension to file her individual tax return, the latest she could file her return without a failure-to-file penalty is October 15th. Paying taxes is an annual responsibility for U.S. citizens and residents, typically due by April 15th. However, if an extension is requested, the Internal Revenue Service (IRS) grants a six-month extension, which moves the deadline from April 15th to October 15th. It is important to note that an extension to file does not mean an extension to pay any taxes owed. Taxes owed are still due by the original deadline, and if not paid, interest and penalties may accrue.