[tetromino_]

I get that the tax man needs to be paid, but what possible justification could there be for

1. demanding for this data monthly, rather than quarterly or yearly; and

2. demanding it via an annoying bespoke process rather than as an entry in the business's regular tax filing or some other pre-existing regular paperwork that small businesses are already submitting?

[tengwar2]

This doesn't look like anything to do with tax. You would definitely need to cover it in the normal tax return in addition to this.