As long as you pay federal taxes by the extended deadline, July 15, 2020, you will not owe additional penalties or interest. Penalties and interest will not begin to accrue until after July 15th. However, state filings and payment deadlines may also be different, depending upon the state in which you reside. A little research may be needed to determine the requirements for your place of residence. For example, the states with different filing and payment deadlines include: Hawaii, Idaho, Iowa, Mississippi and Virginia. North Carolina and Virginia also have extended tax filing and payment deadlines, while also continuing the charge interest on owed taxes paid after April 15, 2020.