Many users have been unable to access MyTax and MyGov since yesterday. Source: Getty Images

It seems an entire year hasn’t been enough for the Australian Taxation Office to prepare its online systems, which appear to have collapsed under the weight of traffic, leaving users unable to lodge their tax returns.

Many users who have been unable to access MyTax and MyGov since Wednesday turned to social media to express their frustration.

As of 10.30 AEST Thursday, both systems were experiencing difficulties, although a link to download the 2015 eTax program has now been updated after confusion yesterday.

A spokesman for the ATO told news.com.au: “We’ve been working through the night to resolve our systems issues and apologise for any inconvenience. We’ll be keeping the community updated through social media.”

On Facebook, users reported glitches using eTax. “I’ve been trying for two days to log into my account, which tells me my passwords are wrong,” one person wrote.

“I’ve then tried several times to create a new account and I still cannot get into it. What is the point in creating this online portal when you cannot even access it? Get your stuff sorted — it’s bloody frustrating!”

Another wrote: “I have started to lodge through eTax but it won’t input/prefill data from my HECS and other things due to the ATO website being down, which will impact my outcome. Not sure it is worth my time to continue.”