Your ability to change the Invoice date on a Supplier Invoice will depend at what stage you are at in the invoice entry sequence.
If you are entering a Supplier invoice and do not have active line items, then you can change the invoice Date by clicking on the Invoice Date field and changing it.
If you have noticed that the invoice Date is incorrect and you have already entered one or more line items to the invoice and you try to correct the invoice Date you will get the error message "Can't change transaction date. Lines active". In this instance, you will not be able to change the invoice Date unless you first delete all active lines from the invoice.
Ensure all lines are deleted, including comment lines. If you still cannot delete the date, click in the line that is displayed and select Delete F6, confirm deletion.
If you have entered multiple lines, you may want to consider if you can post the invoice to the correct period when doing your GL postings.
📌Note: do not do this if the date entered is a future year in error e.g. 2099.
If you have fully accepted the supplier invoice, then no changes can be made to the Invoice date or other invoice details. In this case you will need to;
Enter a Supplier Credit Adjustment Note with the same date to reverse the Invoice.
Re Enter the Supplier Invoice with the correct Invoice Date.