[Closed] Any tax experts - detached duty relief query

Looks like my previous adviser made a bit of a hash of tax calcs and the new bloke needs to clean it up but I want to do a double check on it myself (which I should have done in the first place)

I only moved to the UK in September 2011 and was on temporary international assignment so able to claim "detached duty" relief for 2011/2012. Looks like the previous guy put through the DDR payments recorded on the P11D as taxable benefits but never did an offsetting deduction.

Simple question - what form is used for making a DDR deduction ? SA109? If so, what box does one put it in?