Present perfect

[erin]

Could I use present perfect tense with "in the 1990(specific year)"?
And, what about "in the 1990's"?
I was taught not to use specific past adverbs with present perfect...
But, I have seen those adverbs with present perfect tense.
So, I'd like to know if it is gramatically right, or wrong?

[Casiopea]

Welcome, Erin.

"in 1990" (a specific year) isn't compatible with the present perfect. As for "in the 1990s" (a period of time) I can't seem to think of a single example that works with the present prefect. Would you be willing to provide us with a few of the examples you've come across?