Question: On Earth, the presence of tides due to the Sun and Moon influence certain currents and other movements of water. This in turn leads to different forms of erosion, which can transform a landscape.

I'm working on a moon that's tidally locked to a planet - pretty much identical to the Earth-Moon system, except that the moon is slightly more massive, and has an atmosphere, water, and life (thanks in part to a magnetic field).

How will the tidal locking - meaning a lack of tides - influence the geography of this moon? Will erosion rates be different? Will that land be shaped differently?

Answer: 
The tidal power effects are felt most greatly on larger bodies of water. Although waves are partly influenced by tides, most of their ferocity, and therefore costal erosion, is caused by winds so waves would remain largely unaffected by a tideless environment. Tides don't affect so much ferocity of waves but how far "inland" they travel. 

The tides of Lake Superior vary by no more than two inches. On the other side of the spectrum tides on the Bay of Fundy can vary as much as 50 feet. So some parts that in a tidal planet would be wet part of the time would be left high and dry.

The greatest challenge to a tideless planet would not be erosion but the ecological challenges that a diminished churning of the oceans would present. There would be areas of high nutrient concentration bordering on toxic and dead areas almost completely devoid of nutrients.

Hope this helps.
I do not think tides have any considerable role in forming the landscape. An influence of storms and weather patterns in general is much stronger.

For example, consider Black Sea which had no visible tides for few last Mys. You cannot tell the difference from any other seashore in a similar climatic area.