Those who want to mail off their taxes on Tuesday will have to do so during regular hours.
Although some United States Postal Service offices have extended their hours for Tax Day in the past, that's not the case this year.
"There are no offices extending hours beyond their normal times," said Karen Mazurkiewicz, USPS spokeswoman for Central Pennsylvania.
About 10 years ago, some offices were open as late as midnight because so many people filed their taxes through the mail, Mazurkiewicz said.
"It was a party at the post office ... Those days are gone, and basically, it's based on need," she said.
As of March 28, the Internal Revenue Service reported that 91 percent, or 82 million returns, had been filed electronically. The IRS expects that figure to hold at 85 percent, or 125 million returns, by the end of 2014.
Back in 2000, a little more than 30 million returns were e-filed -- 23.5 percent of total tax returns.
"There's no incentive to keep the post offices open later because there's truly not the volume of mailers that we've had in the past," Mazurkiewicz said.
For customers who file by mail on the big day, she said it's important to know post office hours or collection box pickup times.
That information is available by calling 1-800-ASK-USPS or online at www.usps.com. Some offices around York County, for example, are open until 6 p.m.