Invalid Period returned from HMRC
| Cause | Symptom | Solution |
|---|---|---|
| HMRC only allows test data from 2017 to be submitted. | Invalid Period message is returned. | Correct the year in the XML and retry. |
| Cause | Symptom | Solution |
|---|---|---|
| HMRC only allows test data from 2017 to be submitted. | Invalid Period message is returned. | Correct the year in the XML and retry. |