To my knowledge, we followed the same practice in the past years.

[Tedwonny]

Should we use followed or have followed? I think the latter works better as the present perfect tense should be used?

thanks

[charliedeut]

I believe some more context would be useful.

[BobK]

... as either tense could be appropriate. (The OP mis-used 'as' - logically, that is, not grammatically. )

b

PS There is also the possibility that the speaker is using 'to my knowledge' wrongly, with the intended sense 'This is a fact:...'. Again, context would help.