Additions and deductions for Data Element 4/9 of the Customs Declaration Service Find codes for the additions or deductions to the item price or amount being declared in the Customs Declaration Service (Appendix 10). From: Documents Request an accessible format. If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email different.format@hmrc.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use. Deductions for Data Element 4/9 of the Customs Declaration Service Request an accessible format. If you use assistive technology (such as a screen reader) and need a