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The Basis field is auto-populated if this cash payment was created on the basis of a document of the following types: Payroll Sheet. If , Cheque Issued, Money Payment (Plan). If needed, you can manually select the basis document from the list of available documents (for this, click Show all from the drop-down list). Once the basis document is selected, the data is copied to this cash payment. If, after you edited the document, you want to cancel the edits, click the Fill in button – the details from the basis document will be copied to the payment.
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