Capital gains reporting self assessment on FHL BADR and residential

I have a client that had a furnished holiday let that they disposed of in 2022/23. They reported the gain through a capital gains return and paid the tax over. Now it has come to the tax return and if I tick that it is residential and also qualifies for BADR it is rejected when it is filed on line with error code 6492. I did submit it originally without the residential box ticked but then this removed the information regarding the capital gains return and tax already paid so the client is still being chased for the tax when it had been paid. I did put the information relating to the cgt return in the additional information box but this was not taken note of. How do I report it on the tax return so that  I can point hmrc in the direction of the cgt return filed and the tax already paid as well as claiming BAD relief?

Hi,

As BADR cannot claimed on a residential property, on the actual return, you will show the sale as other property and declare the gain and tax already reported at this section.

Thank you.