Due to the severe weather in recent days the HSE PCRS has slightly relaxed their requirement for receipt of paperwork for early payment, however they would still like to receive the electronic claims my midnight tonight, 5th March 2018. They will allow rare exceptions to this requirements, but only if they receive the electronic claim by midnight tomorrow.
In terms of paperwork, the HSE PCRS accept that many pharmacies will not be in a position to deliver it on time for the early payment deadline and will attempt to process payments as soon as possible, even if they receive your paperwork slightly late.