Did the Germans stop applying tactical markings late war? Seems like most post Normandy vehicles did not have them.

They continued to be applied to softskins, but there is a marked lack of inignia other than crosses on armour. This needs to be qualified depending on unit, area and military situation. Some units seemed to try to mark their vehicles some didn't bother, especially if they were in constant combat. The reasons that they continued to be applied to softskins is that their purpose and affiliation was less obvious than say a tank or SP gun.

Use of unit insignia on tanks certainly diminished in the final year of the war, though there were notable exceptions. The 505th Schwere Panzer Abteilung applied its gaudy charging knight logo on all of its King Tigers, even chiseling away a huge rectangle of Zimmerit on the turret side, so it would look nice. On the other hand, the 510th had a tiny unit emblem on the hull rear that was barely visible, and the 503rd used no battalion insignia at all after the winter of 1942/43.