How to check for clogged fuel line(s) or fuel filter & how to resolve if need be on 1997 Audi A4 Quattro

Since battery replacement Car cranks, but hasn't started. Fuses are good, all wires connected..has almost quarter tank of gas, so I don't know what the issue is.

Asked by for the 1997 Audi A4 Quattro
check for spark and fuel pressure