Hi, the loss carryback scheme is quite complex so what follows isn’t a substitute for professional tax advice, but I hope it’s helpful nonetheless. Firstly, in order to do a carryback there has to be an overall loss in an income tax year. If you still have positive net income when you include both your airbnb income and permanent rental income, you wouldn’t be eligible for carryback. Secondly, it’s my understanding that the carryback applies to businesses only, residential rental property deductions are still ringfenced. So, if you are likely to still be in a net profit position for the year ending March 2021 (albeit less income), your best bet would be sit tight for now and see how the year progresses. If you are provisional tax payers it might be a good option to estimate down your provisional tax payments this year based on how your projected annual income is looking at each provisional tax payment date (August, January, May). The scheme as a whole seems to be positioned primarily for SME businesses who have paid provisional tax during the 2020 year and are heavily impacted by COVID-19 to the point that they are reasonably certain they will make a loss for the 2021 tax year.