2733850 - SII Tax Return is Returned with Message 'Error técnico en la comunicación sincrónica : SOAP:1,027 SRT: Serialization / Deserialization failed'

• SII Tax Return XX is in status Returned.
• The FaultString message is: Error técnico en la comunicación sincrónica : SOAP:1,027 SRT: Serialization / Deserialization failed
  (XX represents the VAT Return ID)

SAP Business ByDesign

1. Go to the Tax Management work center.
2. Go the Tax Returns view.
3. Go to the VAT Returns subview.
4. Show All Tax Returns.
5. Select Tax Return XX.
6. Click on the View button.
   Note:
   Submission Status: Returned
   Approval Status: Not Started
   Message: Error técnico en la comunicación sincrónica : SOAP:1.027 SRT: Serialization / Deserialization failed

The Tax Returns are return by the Tax Authority with the message ''Error técnico en la comunicación sincrónica : SOAP:1.027 SRT: Serialization / Deserialization failed'' when some mandatory information is missing.
In this case, the Country Code of some of one of the customers included in the Tax Return XX is missing.

The Country Code displayed for the Customers in the Tax Return XX comes from the Main Address maintained in the General tab in the Customer's Master Data.

1. Go to the Receivables work center.
2. Go to the Customers view.
3. Go to the Customers subview.
4. Find the relevant Customer.
5. Click on Edit button.
6. Select General.
7. Add the Main Address information including the Country Code.
8. Save.

After above changes have been performed, you will need to reverse the Tax Return XX and then create a new one for the same dates.

SII, Suministro Inmediato de Información, Returned, Serialization, Deserialization, Failed, Error , KBA , technical error , 1.027 , in synchronous communication , 1027 , serialization / deserialization failed , SRD-FIN-TAX , Tax Management , Problem