I have a main report with a parameter called @Group. This allows me to choose which group, from the dropdown, from the data that I want to report on. The report will print invoice data for individual patients. The subreport contains invoice data; invoice number, the patient's unique medical record number(MRN), and the amount of the invoice. I need to filter/link the subreport to the main report based on the patient's MRN. Any thoughts? Do I need an MRN parameter in the subreport and main report?
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