Invoice from co-contractor

When a co-contractor issues an invoice to me and I want to process it in my accounts:

• do I also tick ‘co-contractor’?

• is this expense included in the vAT declaration or not?

• is the category ‘subcontractor’ correct?

• do I also tick ‘co-contractor’?

• is this expense included in the vAT declaration or not?

• is the category ‘subcontractor’ correct?

• do I also tick ‘co-contractor’?

• is this expense included in the vAT declaration or not?

• is the category ‘subcontractor’ correct?

Thanks for your help!

Dimitri