You will need to download the text file from OHIP (right click and "save as" or "save link as")

In Oscar, navigate to your admin, and then down to the billing section and "Upload Schedule of Benefits".

Click on browse (firefox) or choose file (chrome) and select the OHIP text file that you just downloaded and click "import". It may take a few seconds for the file to upload and process, once this is finished, click on the checkbox next to "update" at the top left, this will select everything in the list, then scroll down and click "Update Billing Code Prices"