What tense should I use in these situations?
- In March this year, I was seen near his house.
- In March this year, I have been seen near his house.
Should I use the past simple or the past perfect?
What tense should I use in these situations?
Should I use the past simple or the past perfect?
It is not idiomatic to use the perfect with expressions of time, unless they denote a period which extends up to the present.
So
This year I was seen/have been seen near his house.
or
Since March of this year I was seen/have been seen near his house.
but only
In March of this year I was seen near his house.