Sign in to your return. Start Tax Return Sign In. What to Do After You File a Tax Extension Now that you have filed or efiled a tax extension, you have met your filing requirements (until October 15), but NOT your payment obligations if you owe taxes.If you did not file a tax return or extension by April 15, you have until October 15, 2015 to efile your 2014 Tax Return!Start preparing and efiling your return below! Start Tax Return Now.he worst penalties are for filing late, so you should go ahead and file your tax return now, even if you can't afford to pay what you owe. After you file or efile your return, you can set up a payment plan with the IRS to avoid further penalties and interest. See Step 3. tax return status.