"A lot of people are coming in today," Worthington said, noting that Sunday was busy, too, with business up 50 percent compared with the Sunday before Tax Day last year.
She surmised that taxpayers might have waited because they've become accustomed to having time beyond the April 15 deadline. Last year, people had two extra days to file returns because April 15 fell on a Sunday and Monday was a local holiday in Washington.
"I think they got spoiled in the past couple of years," Worthington said. "This year, they don't have that luxury."
This tax season brought the usual late nights and seventy-hour workweeks that many accounting firms have come to expect.
This year was "more challenging," said Alan Fox, a partner in Fox and Fiorino in Reisterstown. "There's more compliance and more complexity."