Following the successful rollout of the first phase of the scanning capability, HMRC are planning the next stage.
To date, testing of the capability for taxpayer correspondence relating to compliance checks has provided good results, says the Revenue, with more than 150,000 documents scanned.
As the department moves into the next phase, more taxpayers and agents will be required to send documents to PO box addresses for scanning.
Details of return addresses will continue to be included in letters sent out by HMRC.