Letting agents and managers, including internet intermediaries, of premises must file a Form 8-3 return to Revenue. This return must contain details of payments relating to managed premises.
The Form 8-3 must be filed annually in conjunction with the annual Corporation Tax or Income Tax return.
Here is help guide on how to produce a google form to collect any outstanding data you require from your landlords!
Below is how to email all landlords in bulk to request the info from them through AcquaintCRM.