As from 1st October 2019 if you are working as a subcontractor for a main contractor (who isn't the end user of the work) and they operate within the CIS Scheme the way you charge VAT is changing. Please ensure your software has the ability to deal with this. (our CIA software has been updated to deal with the change).
HMRC have introduced this change to protect themselves from the most common fraud they suffer in the Construction Industry.
HMRC estimates around £100m a year is lost from subcontractors billing main contractors (and being paid) VAT but then "disappear" before paying the VAT to HMRC.