State lawmaker prepares bill to postpone filing deadline to May 15, if the IRS does the same for federal income taxes New Jersey taxpayers could get more time to file their state income-tax returns this year if federal officials relax the April 15 deadline for a second straight year amid the coronavirus pandemic. While no decision has been announced by President Joe Biden’s administration, legislation introduced in Trenton this week seeks to give New Jersey taxpayers an extra month to submit their state tax returns in the event the federal Internal Revenue Service eventually delays its own tax deadline. Under the proposal, state income and corporate-business tax returns and payments could be submitted by May 15 this year without any extra fees, penalties or interest.