Follow the steps in Accounts Payable: Setting up the default AP account to set up the accounts payable general ledger account number.

  To understand how Accounting CS Accounts Payable entries post to the general ledger, review How Accounting CS posts cash basis and accrual basis journal entries for accounts payable.

Follow the steps in How to set up standard check types in the Manage Payments screen to change the payment preferences method for each vendor.

Follow the steps in Reconciling the AP Aging Schedule to create an AP Aging Schedule and a General Ledger report. Compare the two reports to identify the differences.

Follow the steps in Accounts Payable: Applying multiple invoices to multiple checks.

Follow the steps in Accounts payable - Showing vendor activity related to accounts payable only to create this report.

• You can select a different Accounts Payable layout that displays the credit memo separately. The Applying a credit memo article contains information for the predefined layouts, containing the words Payable Details Pmts in the description, and credit memos. OR
• Consider entering a negative payable instead of a credit memo. The ability to enter negative-amount payables became available on Accounting CS version 2017.2.0, June 26, 2017. You can select a negative payable to print on a check if the total check amount is more than zero.

Review the Accounts Payable Cash Requirements report to show the cash required on this report.

There are some possible reasons why certain transactions cannot be modified. In Accounts Payable you may not be able to delete a payable because:

• The payable was entered in a prior posting period that is now closed or in a prior year. Change the general ledger posting period and AP date to that prior period/year and delete the payable.
• A payment has been applied to the payable.  Go into Actions > Enter Payables and Unapply the AP Payment before you can delete the payable.
• The payable is marked to pay in the Manage Payments screen. Go to Actions > Manage payments and unselect the payable and click Enter to save your changes. 

• If there are less than 50 payables on display (49 + the "add row"), you can scroll down and look for a warning sign
  
  next to any payable with a transaction date that does not match the posting period.
• If you more than 50 payables, you will see a Results Limited
  
  note in the to left-hand corner of the Enter Payables screen. You can either use the Get more button or a filter to locate payables with a posting period outside of the current posting period. An example would be if you entered your June Payables and found a few of them were missing. Verify your posting period and AP dates are for June (bottom left hand corner) and setup up a filter where Posting Period is greater than 6/30/2018. Show me