@kerrieanne-harte
Did you try to integrate both apps? Afaik, it only supports QBO US version. Consider opening the trial account of QBO Plus UK version.
https://quickbooks.grsm.io/UK
then explore this reference to proceed
https://support.vendhq.com/hc/en-us/articles/[removed]
Another POS option to explore
https://hikeup.com/?afmc=bk
