You can edit any claim in in Ready for Resubmission status status. It means that claim correction or internal complaint has been created but still the transaction hasn't been generated for uploading to Post Office.
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Step 1. Select Ready for Resubmission
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value from Status drop-down list.
The The search results grid appears.
Step 2. Set focus on any claim and click
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Edit claim
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. 
Claim Details dialog appears in edit mode. For internal complaint it look as follows:
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Step 3. Edit available data and click
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Save Resubmission
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.
OR: Click on Click Cancel & close link label to to cancel the changes.
Claim Details dialog closes.