Reversal batches do not enable us to edit the existing invoice. The incorrectly posted invoice must be deleted, reversed in the same period it was incorrectly posted, and a new invoice created with the correct post date. 
  1. Navigate to Accounts Payable > Records > Invoice
  2. Search for and open the desired Invoice
  3. Click the red X at the top of the popup menu to delete the Invoice
  4. Navigate to Accounts Payable > Accounts Payable Processing > Post
  5. Click New Post Parameter
  6. Filter for the deleted invoice and click Post
  7. Navigate to Accounts Payable > Records > Invoice
  8. Create a new invoice with the correct post date