hello,

-I email you as you asked me....to inform you of any progress he has made.
1-To do 2- to do so 3- to 4-…..

which of the above options is correct?and if the sentence is not correct, please correct it.

Thank you.

It is not clear from your sentence whether you mean past or present tense.


Using your words (past tense):

I emailed you as you asked me to inform you of any progress he has made.

Using your words (future tense):

I will email you as you asked me to inform you of any progress he makes.

Other options:

As requested, I have emailed you to inform you of his progress.

As requested, I will email you to inform you of his progress.