Grammar

I have written a letter. (Here it is. Would you like to see it?)
I was so angry that I wrote a letter. (This happened 5 years ago.)
I had already written the letter, but I waited for some time before I decided to send it. (The writing happened before the waiting and sending.)

CJ

CalifJim I have written a letter. (Here it is. Would you like to see it?)

'wrote' can also be used there.

canadian45'wrote' can also be used there.

Please suggest an alternative to place in the parentheses.

Thanks.

CJ

CalifJimPlease suggest an alternative to place in the parentheses.

I (have written)(wrote) a letter. (That's all I can do.)

canadian45I (have written)(wrote) a letter. (That's all I can do.)

I meant after "I ha

CalifJimMaybe nothing suffices?

That's what I think.
Despite many claims to the contrary, simple past tense can also show relevance to the present.
'My knee hurts, I (have) walked too far.'

As far as I'm concerned, the only time present perfect tense is mandatory is to express an ongoing situation.

'I have studied French

'for four years'

canadian45the only time present perfect tense is mandatory is to express an ongoing situation

This is one of the most outrageous claims I have encountered (not *I encountered

Aspara GusThis is one of the most outrageous claims I have encountered (not *I encountered

Then prove me wrong, which that sentence doesn't do! Your preference is not proof of anything.