NFE-1031
Rejeição: Valor do Diferimento da UF difere do calculado [nItem: …] (vDif …, calculado …).
In English The deferred state IBS (gIBSUF/gDif/vDif) is not vBC × the state IBS rate (or pAliqEfet) × pDif (R$ 0.01 tolerance).
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
nfe:infNFe/nfe:det/nfe:imposto/nfe:IBSCBS/nfe:gIBSCBS
not($uf/nfe:gDif) or abs(br:dec($uf/nfe:gDif/nfe:vDif) - round($vBC * $rUF div 100 * br:dec($uf/nfe:gDif/nfe:pDif) div 100, 2)) le 0.01
Checked with NF-e 4.00, NF-e 4.00 with authorisation protocol