One of our companies pays another as a subcontractor — how do I verify it for CIS?

Company Structure offers CIS between companies when more than one company is linked to Xero. Each paying company verifies the sibling it pays with HMRC exactly as it would an outside subcontractor; the UTR, company number and references are edited in the cell and saved through the register, so there is no second copy. Xero still applies the deduction, from its own CIS settings. With fewer than two such companies the panel says 'Needs two or more companies'. CIS returns themselves are done in Xero, never in Saral.