If as a landlord you are not yet in the self-assessment tax system then you need to register for tax self-assessment by the end of next week.
People, including buy-to-let landlords, who need to register for self-assessment for the first-time, have until 5 October, to apply before the HMRC deadline kicks in.
Although the actual cut off for filing a tax return online for the 2017-2018 financial year is 31 January 2019, you need to act now for a User ID and Activation Code by January.
Landlords need to do a tax return if they earn more than £2,500 from renting out property, but those that are not sure if they need to do self-assessment should click here.