Has anybody received penalty for late monthly RTI Filing.If so have you persuaded hmrc to set aside and how did you do this.
There is a rather important detail missing from your query.
Also, what about this query justifies the use of anonymity?
You will have to tell us more about the circumstances in which the late submission arose if you want realistic advice.
Presumably, more than 3 days late and not the first month of late filing in the tax year.
But give us the facts if you want a constructive comment
And drop the anonymity