Hi Jonezh,
A reversal of a posted transaction can be done in many ways.
If you want to reverse a GL voucher - for example - that debits and credits a ledger account then you can make the exact same posting but enter the amount with a minus symbol instead, i.e. post a negative amount.
For other vouchers created e.g. vendor invoices, etc. you can do the same.
Sometimes there is a reversal button available that allows you reversing a transaction by hitting this button.
This is, however, not all the time available and sometimes a reversal is not supported by AX2012 especially in case of complex split postings.
In those cases, you have to recreate the transaction but use "opposite signs".
Best regards,
Ludwig
