has warned some , Vinted and Depop sellers must act to avoid being caught out by the tax office.

A new rule change means online selling platforms must share more information with HM Revenue and Customs (HMRC). It comes in an attempt from the tax body to crack down on online sellers and "" who should be declaring the extra income but aren't.

However, tax rules have not changed, and not all sellers are affected. The key difference is increased transparency between platforms and HMRC.

Additionally, these platforms will only pass on data for those who sell more than 30 items a year and earn around £1,700 and or more.

Tax is also only due to be paid by traders - people who buy items with the intention of selling them for a profit. Those who meet this criteria must submit a self-assessment tax return to HMRC.

The deadline to file a self-assessment tax return for the 2023/24 tax year is Friday, January 31 (today). Those obliged to file one but miss the deadline will face a penalty.

Taking to his Money Show Live on Tuesday night, the Money Saving Expert founder warned: "Airbnb, eBay, Uber, Vinted, and similar have to share your earnings with HMRC due to an international rule change.

"In January last year, they had to start collecting data. By this Friday (today), they have to start sharing it."

However, he noted: "They will pass on your data if you're selling 30 items or over, or earn about £1,700 a year. But crucially, these tax rules have not changed."

He added: "Tax is only due for those who are traders. That is people who are deliberately buying stuff in order to sell it for a profit. Or building and repairing it in order to sell it for a profit. Not producer Alex who was telling me she cleared out her wardrobe.

"You cleared out your wardrobe. It's your stuff. You didn't buy it for profit. You're absolutely fine.

"If you are trading - selling for profit - you can sell a maximum of £1,000 a year of stuff, including platform fees. Above that, you are, and have always been, eligible to pay tax. But now they're reporting it, so be extra careful."

People can check if they need to submit a tax return by using HMRC's free .