Moshe died on the seventh day of Adar, which usually occurs during the week when Tetzaveh is read in Shul. Since his death took place during this week, his name is not mentioned once in the entire Parsha. The Magen Avraham says that even when its a leap year, the people who fast on the seventh of Adar (the day Moshe died) should fast in the first Adar because there are opinions that the year Moshe died was a leap year and that he died in the first Adar.
What are other reasons Moshe's name is not written in this weeks Parsha?