Coding for offset cell references with multiple row headings with merged cells

I figuered out the starting point in Row 18...just me being addtitionally thick....

The copy of the sheet I attached had formula in rows 1-17, where I had been playing around with different ways of trying to achieve what you solved for me.

The code was of course recognising that these rows were occupied and were locating the next available one in order to enter the data.

Cheers....sorry!