Almost 30000 taxpayers submitted their returns via eFiling in the first nine hours of the 2015 Tax S.
They say every time it rained their home got flooded.
Cynthia Yende said they always thought the worst was over until last Thursday, when they realised the present situation was worse than that.
"I have been living here since 2003 and my house has been flooded by water each time it rains," Yende lamented. "The latest flooding was the worst because there was also a hailstorm ... and we were so cold too."
Her son Sthembiso said: "Usually, the flooding affects the outside rooms at the back of the house, but this time the entire house was flooded.
"It was also dangerous because the (electricity) plugs were affected and we could have been shocked to death while we were draining the water."
Yende, 59, said she and her two neighbours, who were similarly affected, had contacted the Ekurhuleni municipality on numerous occasion to no avail.
"Each time they promise to come ... but they never do," Yende said.
"In 2004 the local street committee (comprising concerned local residents) went to the municipality to complain about problems related to service delivery, including the flooding but until now nothing positive has happened. In 2006 we went again, but nobody from the municipality showed up."
Some residents who used to live in the neighbourhood have since left the area.
Yende said a drain three houses away from hers is ineffective.
Municipal spokesman Sam Modiba said the Yendes' complaint would be investigated, and that a reply would be submitted to Sowetan once investigations had been concluded.