Residential Property Income costs - box 44

Do I just put in the mortgage interest or do I have to calculate the 20% myself, or does the self assessment system work it out? Also, I didn't realise I could do this before and didn't put in on my 21-22 and 22-23 tax returns. Can I put those amounts in box 45? Thank you

Hi,
You declare the interest paid and self assessment applies the relevant credit.
Thank you.

Not HMRC...previous years, youll need to amend those returns individually...you cant just put the unclaimed amount as B/fwd, those years tac calculations need to be done individually and if any unused relief is then carried forward, there may not be any...depends on any tax payable in those years, the rate bands, the property income falling liable, personal allowances used first etc etc, t here are too many variables...you need to amend the earlier years returns.

Can you answer the second part of the question? I didn’t put the interest in the previous tax years - 21-22 and 22-23. Can I put those years in box 45? Thanks

Hi.

You will need to amend the tax return you submitted and include the residential property costs for that year.  If it is too late to amend your return, you will need to submit and overpyament

relief claim.  Please review and follow the guidance at:

Self Assessment Claims Manual

to ensure you submit the claim in the correct format.

Thank you.